Sunday code cleaning...

src/main/java/de/ellpeck/actuallyadditions/mod/blocks/base/BlockContainerBase.java

@@ -172,7 +172,7 @@ public abstract class BlockContainerBase extends Block implements EntityBlock {
 
     protected boolean tryUseItemOnTank(Player player, InteractionHand hand, FluidTank tank) {
         ItemStack heldItem = player.getItemInHand(hand);
-        return StackUtil.isValid(heldItem) && FluidUtil.interactWithFluidHandler(player, hand, tank);
+        return !heldItem.isEmpty() && FluidUtil.interactWithFluidHandler(player, hand, tank);
 
     }
 

src/main/java/de/ellpeck/actuallyadditions/mod/blocks/base/BlockPlant.java

@@ -10,7 +10,6 @@
 
 package de.ellpeck.actuallyadditions.mod.blocks.base;
 
-import de.ellpeck.actuallyadditions.mod.util.StackUtil;
 import net.minecraft.core.BlockPos;
 import net.minecraft.server.level.ServerLevel;
 import net.minecraft.world.InteractionHand;
@@ -29,6 +28,7 @@ import net.minecraft.world.level.material.PushReaction;
 import net.minecraft.world.phys.BlockHitResult;
 import net.neoforged.neoforge.items.ItemHandlerHelper;
 
+import javax.annotation.Nonnull;
 import java.util.List;
 import java.util.function.Supplier;
 
@@ -63,8 +63,9 @@ public class BlockPlant extends CropBlock {
     //    }
 
 
+    @Nonnull
     @Override
-    protected ItemInteractionResult useItemOn(ItemStack pStack, BlockState state, Level world, BlockPos pos, Player player, InteractionHand hand, BlockHitResult pHitResult) {
+    protected ItemInteractionResult useItemOn(@Nonnull ItemStack pStack, @Nonnull BlockState state, @Nonnull Level world, @Nonnull BlockPos pos, @Nonnull Player player, @Nonnull InteractionHand hand, @Nonnull BlockHitResult pHitResult) {
         if (this.getAge(state) < 7) {
             return ItemInteractionResult.PASS_TO_DEFAULT_BLOCK_INTERACTION;
         }
@@ -73,12 +74,12 @@ public class BlockPlant extends CropBlock {
             List<ItemStack> drops = Block.getDrops(state, (ServerLevel) world, pos, null);
             boolean deductedSeedSize = false;
             for (ItemStack drop : drops) {
-                if (StackUtil.isValid(drop)) {
+                if (!drop.isEmpty()) {
                     if (drop.getItem() == this.seedItem.get() && !deductedSeedSize) {
                         drop.shrink(1);
                         deductedSeedSize = true;
                     }
-                    if (StackUtil.isValid(drop)) {
+                    if (!drop.isEmpty()) {
                         ItemHandlerHelper.giveItemToPlayer(player, drop);
                     }
                 }
@@ -90,6 +91,7 @@ public class BlockPlant extends CropBlock {
         return super.useItemOn(pStack, state, world, pos, player, hand, pHitResult);
     }
 
+    @Nonnull
     @Override
     protected ItemLike getBaseSeedId() {
         return this.seedItem.get();

src/main/java/de/ellpeck/actuallyadditions/mod/blocks/render/RenderEmpowerer.java

@@ -16,7 +16,6 @@ import de.ellpeck.actuallyadditions.mod.ActuallyAdditions;
 import de.ellpeck.actuallyadditions.mod.crafting.EmpowererRecipe;
 import de.ellpeck.actuallyadditions.mod.tile.TileEntityEmpowerer;
 import de.ellpeck.actuallyadditions.mod.util.AssetUtil;
-import de.ellpeck.actuallyadditions.mod.util.StackUtil;
 import net.minecraft.Util;
 import net.minecraft.client.renderer.MultiBufferSource;
 import net.minecraft.client.renderer.blockentity.BlockEntityRenderer;
@@ -29,14 +28,16 @@ import net.minecraft.world.item.ItemStack;
 import net.minecraft.world.item.crafting.RecipeHolder;
 import net.minecraft.world.phys.Vec3;
 
+import javax.annotation.Nonnull;
+
 public class RenderEmpowerer implements BlockEntityRenderer<TileEntityEmpowerer> {
     public RenderEmpowerer(BlockEntityRendererProvider.Context context) {
     }
 
     @Override
-    public void render(TileEntityEmpowerer tile, float partialTicks, PoseStack matrices, MultiBufferSource buffer, int combinedLight, int combinedOverlay) {
+    public void render(TileEntityEmpowerer tile, float partialTicks, @Nonnull PoseStack matrices, @Nonnull MultiBufferSource buffer, int combinedLight, int combinedOverlay) {
         ItemStack stack = tile.inv.getStackInSlot(0);
-        if (StackUtil.isValid(stack)) {
+        if (!stack.isEmpty()) {
             // TODO: [port][refactor] migrate this logic into a single method, most renders use it
             matrices.pushPose();
             matrices.translate(0.5F, 1F, 0.5F);

src/main/java/de/ellpeck/actuallyadditions/mod/blocks/render/RenderLaserRelay.java

@@ -20,7 +20,6 @@ import de.ellpeck.actuallyadditions.mod.items.ItemEngineerGoggles;
 import de.ellpeck.actuallyadditions.mod.items.ItemLaserWrench;
 import de.ellpeck.actuallyadditions.mod.tile.TileEntityLaserRelay;
 import de.ellpeck.actuallyadditions.mod.util.AssetUtil;
-import de.ellpeck.actuallyadditions.mod.util.StackUtil;
 import io.netty.util.internal.ConcurrentSet;
 import net.minecraft.Util;
 import net.minecraft.client.Minecraft;
@@ -58,13 +57,13 @@ public class RenderLaserRelay implements BlockEntityRenderer<TileEntityLaserRela
         boolean hasGoggles = ItemEngineerGoggles.isWearing(player);
 
         ItemStack upgrade = relay.inv.getStackInSlot(0);
-        if (StackUtil.isValid(upgrade)) {
+        if (!upgrade.isEmpty()) {
             if (upgrade.getItem() == ActuallyItems.LASER_UPGRADE_INVISIBILITY.get()) {
                 hasInvis = true;
             }
 
             ItemStack hand = player.getMainHandItem();
-            if (hasGoggles || StackUtil.isValid(hand) && (hand.getItem() == CommonConfig.Other.relayConfigureItem || hand.getItem() instanceof ItemLaserWrench) || "themattabase".equals(player.getName().getString())) {
+            if (hasGoggles || !hand.isEmpty() && (hand.getItem() == CommonConfig.Other.relayConfigureItem || hand.getItem() instanceof ItemLaserWrench) || "themattabase".equals(player.getName().getString())) {
                 matrices.pushPose();
                 Direction direction = state.hasProperty(BlockStateProperties.FACING) ?
                         state.getValue(BlockStateProperties.FACING) : Direction.UP;
@@ -92,7 +91,7 @@ public class RenderLaserRelay implements BlockEntityRenderer<TileEntityLaserRela
                     BlockEntity secondTile = tile.getLevel().getBlockEntity(second);
                     if (secondTile instanceof TileEntityLaserRelay) {
                         ItemStack secondUpgrade = ((TileEntityLaserRelay) secondTile).inv.getStackInSlot(0);
-                        boolean otherInvis = StackUtil.isValid(secondUpgrade) && secondUpgrade.getItem() == ActuallyItems.LASER_UPGRADE_INVISIBILITY.get();
+                        boolean otherInvis = !secondUpgrade.isEmpty() && secondUpgrade.getItem() == ActuallyItems.LASER_UPGRADE_INVISIBILITY.get();
 
                         if (hasGoggles || !hasInvis || !otherInvis) {
                             int color = hasInvis && otherInvis

src/main/java/de/ellpeck/actuallyadditions/mod/event/ClientEvents.java

@@ -232,7 +232,7 @@ public class ClientEvents {
             Font font = minecraft.font;
             ItemStack stack = player.getMainHandItem();
 
-            if (StackUtil.isValid(stack)) {
+            if (!stack.isEmpty()) {
                 if (stack.getItem() instanceof IHudDisplay) {
                     ((IHudDisplay) stack.getItem()).displayHud(guiGraphics, minecraft, player, stack, posHit, minecraft.getWindow());
                 }

src/main/java/de/ellpeck/actuallyadditions/mod/event/CommonEvents.java

@@ -85,12 +85,12 @@ public class CommonEvents {
         ItemEntity item = event.getItemEntity();
         if (item != null && item.isAlive()) {
             ItemStack stack = item.getItem();
-            if (StackUtil.isValid(stack)) {
+            if (!stack.isEmpty()) {
                 for (int i = 0; i < player.getInventory().getContainerSize(); i++) {
                     if (i != player.getInventory().selected) {
 
                         ItemStack invStack = player.getInventory().getItem(i);
-                        if (StackUtil.isValid(invStack) && (invStack.getItem() instanceof Sack)) {
+                        if (!invStack.isEmpty() && (invStack.getItem() instanceof Sack)) {
                             boolean changed = false;
                             boolean isVoid = ((Sack) invStack.getItem()).isVoid;
 
@@ -114,7 +114,7 @@ public class CommonEvents {
                                 if (filter.check(stack)) {
                                     for (int j = 0; j < inv.getSlots(); j++) {
                                         ItemStack bagStack = inv.getStackInSlot(j);
-                                        if (StackUtil.isValid(bagStack)) {
+                                        if (!bagStack.isEmpty()) {
                                             if (ItemUtil.canBeStacked(bagStack, stack)) {
                                                 int maxTransfer = Math.min(stack.getCount(), stack.getMaxStackSize() - bagStack.getCount());
                                                 if (maxTransfer > 0) {
@@ -145,7 +145,7 @@ public class CommonEvents {
                         }
                     }
 
-                    if (!StackUtil.isValid(stack)) {
+                    if (stack.isEmpty()) {
                         break;
                     }
                 }
@@ -195,7 +195,7 @@ public class CommonEvents {
         //checkAchievements(event.crafting, event.player, InitAchievements.Type.CRAFTING);
 
         if (CommonConfig.Other.GIVE_BOOKLET_ON_FIRST_CRAFT.get()) {
-            if (!event.getEntity().level().isClientSide && StackUtil.isValid(event.getCrafting()) && event.getCrafting().getItem() != ActuallyItems.ITEM_BOOKLET.get()) {
+            if (!event.getEntity().level().isClientSide && !event.getCrafting().isEmpty() && event.getCrafting().getItem() != ActuallyItems.ITEM_BOOKLET.get()) {
 
                 String name = BuiltInRegistries.ITEM.getKey(event.getCrafting().getItem()).toString();
                 if (name != null && name.toLowerCase(Locale.ROOT).contains(ActuallyAdditions.MODID)) {

src/main/java/de/ellpeck/actuallyadditions/mod/inventory/ContainerBioReactor.java

@@ -12,7 +12,6 @@ package de.ellpeck.actuallyadditions.mod.inventory;
 
 import de.ellpeck.actuallyadditions.mod.inventory.slot.SlotItemHandlerUnconditioned;
 import de.ellpeck.actuallyadditions.mod.tile.TileEntityBioReactor;
-import de.ellpeck.actuallyadditions.mod.util.StackUtil;
 import net.minecraft.network.FriendlyByteBuf;
 import net.minecraft.world.entity.player.Inventory;
 import net.minecraft.world.entity.player.Player;
@@ -20,6 +19,7 @@ import net.minecraft.world.inventory.AbstractContainerMenu;
 import net.minecraft.world.inventory.Slot;
 import net.minecraft.world.item.ItemStack;
 
+import javax.annotation.Nonnull;
 import java.util.Objects;
 
 public class ContainerBioReactor extends AbstractContainerMenu {
@@ -50,8 +50,9 @@ public class ContainerBioReactor extends AbstractContainerMenu {
         }
     }
 
+    @Nonnull
     @Override
-    public ItemStack quickMoveStack(Player player, int slot) {
+    public ItemStack quickMoveStack(@Nonnull Player player, int slot) {
         int inventoryStart = 8;
         int inventoryEnd = inventoryStart + 26;
         int hotbarStart = inventoryEnd + 1;
@@ -84,7 +85,7 @@ public class ContainerBioReactor extends AbstractContainerMenu {
                 return ItemStack.EMPTY;
             }
 
-            if (!StackUtil.isValid(newStack)) {
+            if (newStack.isEmpty()) {
                 theSlot.set(ItemStack.EMPTY);
             } else {
                 theSlot.setChanged();
@@ -101,7 +102,7 @@ public class ContainerBioReactor extends AbstractContainerMenu {
     }
 
     @Override
-    public boolean stillValid(Player player) {
+    public boolean stillValid(@Nonnull Player player) {
         return this.tile.canPlayerUse(player);
     }
 }

src/main/java/de/ellpeck/actuallyadditions/mod/inventory/ContainerBreaker.java

@@ -12,7 +12,6 @@ package de.ellpeck.actuallyadditions.mod.inventory;
 
 import de.ellpeck.actuallyadditions.mod.inventory.slot.SlotItemHandlerUnconditioned;
 import de.ellpeck.actuallyadditions.mod.tile.TileEntityBreaker;
-import de.ellpeck.actuallyadditions.mod.util.StackUtil;
 import net.minecraft.network.FriendlyByteBuf;
 import net.minecraft.world.entity.player.Inventory;
 import net.minecraft.world.entity.player.Player;
@@ -20,6 +19,7 @@ import net.minecraft.world.inventory.AbstractContainerMenu;
 import net.minecraft.world.inventory.Slot;
 import net.minecraft.world.item.ItemStack;
 
+import javax.annotation.Nonnull;
 import java.util.Objects;
 
 public class ContainerBreaker extends AbstractContainerMenu {
@@ -51,8 +51,9 @@ public class ContainerBreaker extends AbstractContainerMenu {
         }
     }
 
+    @Nonnull
     @Override
-    public ItemStack quickMoveStack(Player player, int slot) {
+    public ItemStack quickMoveStack(@Nonnull Player player, int slot) {
         int inventoryStart = 9;
         int inventoryEnd = inventoryStart + 26;
         int hotbarStart = inventoryEnd + 1;
@@ -81,7 +82,7 @@ public class ContainerBreaker extends AbstractContainerMenu {
                 return ItemStack.EMPTY;
             }
 
-            if (!StackUtil.isValid(newStack)) {
+            if (newStack.isEmpty()) {
                 theSlot.set(ItemStack.EMPTY);
             } else {
                 theSlot.setChanged();
@@ -98,7 +99,7 @@ public class ContainerBreaker extends AbstractContainerMenu {
     }
 
     @Override
-    public boolean stillValid(Player player) {
+    public boolean stillValid(@Nonnull Player player) {
         return this.breaker.canPlayerUse(player);
     }
 }

src/main/java/de/ellpeck/actuallyadditions/mod/inventory/ContainerCanolaPress.java

@@ -13,7 +13,6 @@ package de.ellpeck.actuallyadditions.mod.inventory;
 import de.ellpeck.actuallyadditions.mod.crafting.PressingRecipe;
 import de.ellpeck.actuallyadditions.mod.inventory.slot.SlotItemHandlerUnconditioned;
 import de.ellpeck.actuallyadditions.mod.tile.TileEntityCanolaPress;
-import de.ellpeck.actuallyadditions.mod.util.StackUtil;
 import net.minecraft.network.FriendlyByteBuf;
 import net.minecraft.world.entity.player.Inventory;
 import net.minecraft.world.entity.player.Player;
@@ -22,6 +21,7 @@ import net.minecraft.world.inventory.Slot;
 import net.minecraft.world.item.ItemStack;
 import net.minecraft.world.item.crafting.RecipeHolder;
 
+import javax.annotation.Nonnull;
 import java.util.Objects;
 import java.util.Optional;
 
@@ -49,8 +49,9 @@ public class ContainerCanolaPress extends AbstractContainerMenu {
         return new ContainerCanolaPress(windowId, inv, (TileEntityCanolaPress) Objects.requireNonNull(inv.player.level().getBlockEntity(data.readBlockPos())));
     }
 
+    @Nonnull
     @Override
-    public ItemStack quickMoveStack(Player player, int slot) {
+    public ItemStack quickMoveStack(@Nonnull Player player, int slot) {
         int inventoryStart = 1;
         int inventoryEnd = inventoryStart + 26;
         int hotbarStart = inventoryEnd + 1;
@@ -84,7 +85,7 @@ public class ContainerCanolaPress extends AbstractContainerMenu {
                 return ItemStack.EMPTY;
             }
 
-            if (!StackUtil.isValid(newStack)) {
+            if (newStack.isEmpty()) {
                 theSlot.set(ItemStack.EMPTY);
             } else {
                 theSlot.setChanged();
@@ -101,7 +102,7 @@ public class ContainerCanolaPress extends AbstractContainerMenu {
     }
 
     @Override
-    public boolean stillValid(Player player) {
+    public boolean stillValid(@Nonnull Player player) {
         return this.press.canPlayerUse(player);
     }
 }

src/main/java/de/ellpeck/actuallyadditions/mod/inventory/ContainerCoalGenerator.java

@@ -12,7 +12,6 @@ package de.ellpeck.actuallyadditions.mod.inventory;
 
 import de.ellpeck.actuallyadditions.mod.inventory.slot.SlotItemHandlerUnconditioned;
 import de.ellpeck.actuallyadditions.mod.tile.TileEntityCoalGenerator;
-import de.ellpeck.actuallyadditions.mod.util.StackUtil;
 import net.minecraft.network.FriendlyByteBuf;
 import net.minecraft.world.entity.player.Inventory;
 import net.minecraft.world.entity.player.Player;
@@ -20,6 +19,7 @@ import net.minecraft.world.inventory.AbstractContainerMenu;
 import net.minecraft.world.inventory.Slot;
 import net.minecraft.world.item.ItemStack;
 
+import javax.annotation.Nonnull;
 import java.util.Objects;
 
 public class ContainerCoalGenerator extends AbstractContainerMenu {
@@ -46,8 +46,9 @@ public class ContainerCoalGenerator extends AbstractContainerMenu {
         }
     }
 
+    @Nonnull
     @Override
-    public ItemStack quickMoveStack(Player player, int slot) {
+    public ItemStack quickMoveStack(@Nonnull Player player, int slot) {
         int inventoryStart = 1;
         int inventoryEnd = inventoryStart + 26;
         int hotbarStart = inventoryEnd + 1;
@@ -80,7 +81,7 @@ public class ContainerCoalGenerator extends AbstractContainerMenu {
                 return ItemStack.EMPTY;
             }
 
-            if (!StackUtil.isValid(newStack)) {
+            if (newStack.isEmpty()) {
                 theSlot.set(ItemStack.EMPTY);
             } else {
                 theSlot.setChanged();
@@ -97,7 +98,7 @@ public class ContainerCoalGenerator extends AbstractContainerMenu {
     }
 
     @Override
-    public boolean stillValid(Player player) {
+    public boolean stillValid(@Nonnull Player player) {
         return this.generator.canPlayerUse(player);
     }
 }

src/main/java/de/ellpeck/actuallyadditions/mod/inventory/ContainerCoffeeMachine.java

@@ -16,7 +16,6 @@ import de.ellpeck.actuallyadditions.mod.inventory.slot.SlotOutput;
 import de.ellpeck.actuallyadditions.mod.items.ActuallyItems;
 import de.ellpeck.actuallyadditions.mod.items.ItemCoffee;
 import de.ellpeck.actuallyadditions.mod.tile.TileEntityCoffeeMachine;
-import de.ellpeck.actuallyadditions.mod.util.StackUtil;
 import net.minecraft.network.FriendlyByteBuf;
 import net.minecraft.world.entity.player.Inventory;
 import net.minecraft.world.entity.player.Player;
@@ -24,6 +23,7 @@ import net.minecraft.world.inventory.AbstractContainerMenu;
 import net.minecraft.world.inventory.Slot;
 import net.minecraft.world.item.ItemStack;
 
+import javax.annotation.Nonnull;
 import java.util.Objects;
 
 public class ContainerCoffeeMachine extends AbstractContainerMenu {
@@ -58,8 +58,9 @@ public class ContainerCoffeeMachine extends AbstractContainerMenu {
         }
     }
 
+    @Nonnull
     @Override
-    public ItemStack quickMoveStack(Player player, int slot) {
+    public ItemStack quickMoveStack(@Nonnull Player player, int slot) {
         int inventoryStart = 11;
         int inventoryEnd = inventoryStart + 26;
         int hotbarStart = inventoryEnd + 1;
@@ -107,7 +108,7 @@ public class ContainerCoffeeMachine extends AbstractContainerMenu {
                 return ItemStack.EMPTY;
             }
 
-            if (!StackUtil.isValid(newStack)) {
+            if (newStack.isEmpty()) {
                 theSlot.set(ItemStack.EMPTY);
             } else {
                 theSlot.setChanged();
@@ -124,7 +125,7 @@ public class ContainerCoffeeMachine extends AbstractContainerMenu {
     }
 
     @Override
-    public boolean stillValid(Player player) {
+    public boolean stillValid(@Nonnull Player player) {
         return this.machine.canPlayerUse(player);
     }
 }

src/main/java/de/ellpeck/actuallyadditions/mod/inventory/ContainerDirectionalBreaker.java

@@ -12,7 +12,6 @@ package de.ellpeck.actuallyadditions.mod.inventory;
 
 import de.ellpeck.actuallyadditions.mod.inventory.slot.SlotItemHandlerUnconditioned;
 import de.ellpeck.actuallyadditions.mod.tile.TileEntityLongRangeBreaker;
-import de.ellpeck.actuallyadditions.mod.util.StackUtil;
 import net.minecraft.network.FriendlyByteBuf;
 import net.minecraft.world.entity.player.Inventory;
 import net.minecraft.world.entity.player.Player;
@@ -20,6 +19,7 @@ import net.minecraft.world.inventory.AbstractContainerMenu;
 import net.minecraft.world.inventory.Slot;
 import net.minecraft.world.item.ItemStack;
 
+import javax.annotation.Nonnull;
 import java.util.Objects;
 
 public class ContainerDirectionalBreaker extends AbstractContainerMenu {
@@ -50,8 +50,9 @@ public class ContainerDirectionalBreaker extends AbstractContainerMenu {
         return new ContainerDirectionalBreaker(windowId, inv, (TileEntityLongRangeBreaker) Objects.requireNonNull(inv.player.level().getBlockEntity(data.readBlockPos())));
     }
 
+    @Nonnull
     @Override
-    public ItemStack quickMoveStack(Player player, int slot) {
+    public ItemStack quickMoveStack(@Nonnull Player player, int slot) {
         int inventoryStart = 9;
         int inventoryEnd = inventoryStart + 26;
         int hotbarStart = inventoryEnd + 1;
@@ -80,7 +81,7 @@ public class ContainerDirectionalBreaker extends AbstractContainerMenu {
                 return ItemStack.EMPTY;
             }
 
-            if (!StackUtil.isValid(newStack)) {
+            if (newStack.isEmpty()) {
                 theSlot.set(ItemStack.EMPTY);
             } else {
                 theSlot.setChanged();
@@ -97,7 +98,7 @@ public class ContainerDirectionalBreaker extends AbstractContainerMenu {
     }
 
     @Override
-    public boolean stillValid(Player player) {
+    public boolean stillValid(@Nonnull Player player) {
         return this.breaker.canPlayerUse(player);
     }
 }

src/main/java/de/ellpeck/actuallyadditions/mod/inventory/ContainerDrill.java

@@ -15,7 +15,6 @@ import de.ellpeck.actuallyadditions.mod.inventory.slot.SlotItemHandlerUnconditio
 import de.ellpeck.actuallyadditions.mod.items.DrillItem;
 import de.ellpeck.actuallyadditions.mod.items.ItemDrillUpgrade;
 import de.ellpeck.actuallyadditions.mod.util.ItemStackHandlerAA;
-import de.ellpeck.actuallyadditions.mod.util.StackUtil;
 import net.minecraft.network.FriendlyByteBuf;
 import net.minecraft.world.entity.player.Inventory;
 import net.minecraft.world.entity.player.Player;
@@ -24,6 +23,8 @@ import net.minecraft.world.inventory.ClickType;
 import net.minecraft.world.inventory.Slot;
 import net.minecraft.world.item.ItemStack;
 
+import javax.annotation.Nonnull;
+
 public class ContainerDrill extends AbstractContainerMenu {
 
     public static final int SLOT_AMOUNT = 5;
@@ -62,13 +63,14 @@ public class ContainerDrill extends AbstractContainerMenu {
         }
 
         ItemStack stack = inventory.getSelected();
-        if (StackUtil.isValid(stack) && stack.getItem() instanceof DrillItem) {
+        if (!stack.isEmpty() && stack.getItem() instanceof DrillItem) {
             DrillItem.loadSlotsFromNBT(this.drillInventory, inventory.getSelected());
         }
     }
 
+    @Nonnull
     @Override
-    public ItemStack quickMoveStack(Player player, int slot) {
+    public ItemStack quickMoveStack(@Nonnull Player player, int slot) {
         int inventoryStart = 5;
         int inventoryEnd = inventoryStart + 26;
         int hotbarStart = inventoryEnd + 1;
@@ -101,7 +103,7 @@ public class ContainerDrill extends AbstractContainerMenu {
                 return ItemStack.EMPTY;
             }
 
-            if (!StackUtil.isValid(newStack)) {
+            if (newStack.isEmpty()) {
                 theSlot.set(ItemStack.EMPTY);
             } else {
                 theSlot.setChanged();
@@ -118,7 +120,7 @@ public class ContainerDrill extends AbstractContainerMenu {
     }
 
     @Override
-    public void clicked(int slotId, int dragType, ClickType clickTypeIn, Player player) {
+    public void clicked(int slotId, int dragType, @Nonnull ClickType clickTypeIn, @Nonnull Player player) {
         if (clickTypeIn == ClickType.SWAP && dragType == this.inventory.selected) {
             return; //TODO: Check if this is correct, used to return ItemStack.EMPTY
         } else {
@@ -127,16 +129,16 @@ public class ContainerDrill extends AbstractContainerMenu {
     }
 
     @Override
-    public void removed(Player player) {
+    public void removed(@Nonnull Player player) {
         ItemStack stack = this.inventory.getSelected();
-        if (StackUtil.isValid(stack) && stack.getItem() instanceof DrillItem) {
+        if (!stack.isEmpty() && stack.getItem() instanceof DrillItem) {
             DrillItem.writeSlotsToNBT(this.drillInventory, this.inventory.getSelected());
         }
         super.removed(player);
     }
 
     @Override
-    public boolean stillValid(Player player) {
+    public boolean stillValid(@Nonnull Player player) {
         return true;
     }
 }

src/main/java/de/ellpeck/actuallyadditions/mod/inventory/ContainerDropper.java

@@ -13,7 +13,6 @@ package de.ellpeck.actuallyadditions.mod.inventory;
 import de.ellpeck.actuallyadditions.mod.blocks.ActuallyBlocks;
 import de.ellpeck.actuallyadditions.mod.inventory.slot.SlotItemHandlerUnconditioned;
 import de.ellpeck.actuallyadditions.mod.tile.TileEntityDropper;
-import de.ellpeck.actuallyadditions.mod.util.StackUtil;
 import net.minecraft.network.FriendlyByteBuf;
 import net.minecraft.world.entity.player.Inventory;
 import net.minecraft.world.entity.player.Player;
@@ -21,6 +20,7 @@ import net.minecraft.world.inventory.AbstractContainerMenu;
 import net.minecraft.world.inventory.Slot;
 import net.minecraft.world.item.ItemStack;
 
+import javax.annotation.Nonnull;
 import java.util.Objects;
 
 public class ContainerDropper extends AbstractContainerMenu {
@@ -53,8 +53,9 @@ public class ContainerDropper extends AbstractContainerMenu {
         }
     }
 
+    @Nonnull
     @Override
-    public ItemStack quickMoveStack(Player player, int slot) {
+    public ItemStack quickMoveStack(@Nonnull Player player, int slot) {
         int inventoryStart = 9;
         int inventoryEnd = inventoryStart + 26;
         int hotbarStart = inventoryEnd + 1;
@@ -83,7 +84,7 @@ public class ContainerDropper extends AbstractContainerMenu {
                 return ItemStack.EMPTY;
             }
 
-            if (!StackUtil.isValid(newStack)) {
+            if (newStack.isEmpty()) {
                 theSlot.set(ItemStack.EMPTY);
             } else {
                 theSlot.setChanged();

src/main/java/de/ellpeck/actuallyadditions/mod/inventory/ContainerEnervator.java

@@ -14,7 +14,6 @@ import de.ellpeck.actuallyadditions.mod.inventory.slot.ArmorSlot;
 import de.ellpeck.actuallyadditions.mod.inventory.slot.SlotItemHandlerUnconditioned;
 import de.ellpeck.actuallyadditions.mod.inventory.slot.SlotOutput;
 import de.ellpeck.actuallyadditions.mod.tile.TileEntityEnervator;
-import de.ellpeck.actuallyadditions.mod.util.StackUtil;
 import net.minecraft.network.FriendlyByteBuf;
 import net.minecraft.resources.ResourceLocation;
 import net.minecraft.world.entity.EquipmentSlot;
@@ -26,6 +25,7 @@ import net.minecraft.world.inventory.Slot;
 import net.minecraft.world.item.ItemStack;
 import net.neoforged.neoforge.capabilities.Capabilities;
 
+import javax.annotation.Nonnull;
 import java.util.Objects;
 
 public class ContainerEnervator extends AbstractContainerMenu {
@@ -59,8 +59,9 @@ public class ContainerEnervator extends AbstractContainerMenu {
         }
     }
 
+    @Nonnull
     @Override
-    public ItemStack quickMoveStack(Player player, int slot) {
+    public ItemStack quickMoveStack(@Nonnull Player player, int slot) {
         int inventoryStart = 2;
         int inventoryEnd = inventoryStart + 26;
         int hotbarStart = inventoryEnd + 1;
@@ -100,7 +101,7 @@ public class ContainerEnervator extends AbstractContainerMenu {
                 return ItemStack.EMPTY;
             }
 
-            if (!StackUtil.isValid(newStack)) {
+            if (newStack.isEmpty()) {
                 theSlot.set(ItemStack.EMPTY);
             } else {
                 theSlot.setChanged();

src/main/java/de/ellpeck/actuallyadditions/mod/inventory/ContainerOilGenerator.java

@@ -11,7 +11,6 @@
 package de.ellpeck.actuallyadditions.mod.inventory;
 
 import de.ellpeck.actuallyadditions.mod.tile.TileEntityOilGenerator;
-import de.ellpeck.actuallyadditions.mod.util.StackUtil;
 import net.minecraft.network.FriendlyByteBuf;
 import net.minecraft.world.entity.player.Inventory;
 import net.minecraft.world.entity.player.Player;
@@ -19,6 +18,7 @@ import net.minecraft.world.inventory.AbstractContainerMenu;
 import net.minecraft.world.inventory.Slot;
 import net.minecraft.world.item.ItemStack;
 
+import javax.annotation.Nonnull;
 import java.util.Objects;
 
 public class ContainerOilGenerator extends AbstractContainerMenu {
@@ -43,8 +43,9 @@ public class ContainerOilGenerator extends AbstractContainerMenu {
         }
     }
 
+    @Nonnull
     @Override
-    public ItemStack quickMoveStack(Player player, int slot) {
+    public ItemStack quickMoveStack(@Nonnull Player player, int slot) {
         int inventoryStart = 0;
         int inventoryEnd = inventoryStart + 26;
         int hotbarStart = inventoryEnd + 1;
@@ -69,7 +70,7 @@ public class ContainerOilGenerator extends AbstractContainerMenu {
                 return ItemStack.EMPTY;
             }
 
-            if (!StackUtil.isValid(newStack)) {
+            if (newStack.isEmpty()) {
                 theSlot.set(ItemStack.EMPTY);
             } else {
                 theSlot.setChanged();
@@ -86,7 +87,7 @@ public class ContainerOilGenerator extends AbstractContainerMenu {
     }
 
     @Override
-    public boolean stillValid(Player player) {
+    public boolean stillValid(@Nonnull Player player) {
         return this.generator.canPlayerUse(player);
     }
 }

src/main/java/de/ellpeck/actuallyadditions/mod/inventory/ContainerPhantomPlacer.java

@@ -12,7 +12,6 @@ package de.ellpeck.actuallyadditions.mod.inventory;
 
 import de.ellpeck.actuallyadditions.mod.inventory.slot.SlotItemHandlerUnconditioned;
 import de.ellpeck.actuallyadditions.mod.tile.TileEntityPhantomPlacer;
-import de.ellpeck.actuallyadditions.mod.util.StackUtil;
 import net.minecraft.network.FriendlyByteBuf;
 import net.minecraft.world.entity.player.Inventory;
 import net.minecraft.world.entity.player.Player;
@@ -20,6 +19,7 @@ import net.minecraft.world.inventory.AbstractContainerMenu;
 import net.minecraft.world.inventory.Slot;
 import net.minecraft.world.item.ItemStack;
 
+import javax.annotation.Nonnull;
 import java.util.Objects;
 
 public class ContainerPhantomPlacer extends AbstractContainerMenu {
@@ -50,8 +50,9 @@ public class ContainerPhantomPlacer extends AbstractContainerMenu {
         }
     }
 
+    @Nonnull
     @Override
-    public ItemStack quickMoveStack(Player player, int slot) {
+    public ItemStack quickMoveStack(@Nonnull Player player, int slot) {
         int inventoryStart = 9;
         int inventoryEnd = inventoryStart + 26;
         int hotbarStart = inventoryEnd + 1;
@@ -80,7 +81,7 @@ public class ContainerPhantomPlacer extends AbstractContainerMenu {
                 return ItemStack.EMPTY;
             }
 
-            if (!StackUtil.isValid(newStack)) {
+            if (newStack.isEmpty()) {
                 theSlot.set(ItemStack.EMPTY);
             } else {
                 theSlot.setChanged();
@@ -97,7 +98,7 @@ public class ContainerPhantomPlacer extends AbstractContainerMenu {
     }
 
     @Override
-    public boolean stillValid(Player player) {
+    public boolean stillValid(@Nonnull Player player) {
         return this.placer.canPlayerUse(player);
     }
 }

src/main/java/de/ellpeck/actuallyadditions/mod/items/Filler.java

@@ -12,7 +12,6 @@ package de.ellpeck.actuallyadditions.mod.items;
 
 import de.ellpeck.actuallyadditions.mod.components.ActuallyComponents;
 import de.ellpeck.actuallyadditions.mod.items.base.ItemEnergy;
-import de.ellpeck.actuallyadditions.mod.util.StackUtil;
 import de.ellpeck.actuallyadditions.mod.util.Util;
 import net.minecraft.core.BlockPos;
 import net.minecraft.network.chat.Component;
@@ -32,7 +31,7 @@ import net.minecraft.world.level.block.state.BlockState;
 import net.minecraft.world.phys.BlockHitResult;
 import net.minecraft.world.phys.HitResult;
 
-import javax.annotation.Nullable;
+import javax.annotation.Nonnull;
 import java.util.List;
 import java.util.Optional;
 
@@ -46,12 +45,12 @@ public class Filler extends ItemEnergy {
         Block block = state.getBlock();
         ItemStack stack = new ItemStack(block, 1);
 
-        if (StackUtil.isValid(stack)) {
+        if (!stack.isEmpty()) {
             for (int i = 0; i < player.getInventory().getContainerSize(); i++) {
                 ItemStack slot = player.getInventory().getItem(i);
-                if (StackUtil.isValid(slot) && ItemStack.isSameItem(slot, stack)) {
+                if (!slot.isEmpty() && ItemStack.isSameItem(slot, stack)) {
                     slot.shrink(1);
-                    if (!StackUtil.isValid(slot)) {
+                    if (slot.isEmpty()) {
                         player.getInventory().setItem(i, ItemStack.EMPTY);
                     }
 
@@ -74,6 +73,7 @@ public class Filler extends ItemEnergy {
         return Optional.empty();
     }
 
+    @Nonnull
     @Override
     public InteractionResult useOn(UseOnContext context) {
         if (context.getPlayer() == null) {
@@ -100,7 +100,7 @@ public class Filler extends ItemEnergy {
     }
 
     @Override
-    public void releaseUsing(ItemStack stack, Level world, LivingEntity entity, int timeLeft) {
+    public void releaseUsing(@Nonnull ItemStack stack, Level world, @Nonnull LivingEntity entity, int timeLeft) {
         if (!world.isClientSide) {
             boolean clear = true;
             if (entity instanceof Player player) {
@@ -123,7 +123,7 @@ public class Filler extends ItemEnergy {
     }
 
     @Override
-    public void inventoryTick(ItemStack stack, Level world, Entity entity, int itemSlot, boolean isSelected) {
+    public void inventoryTick(@Nonnull ItemStack stack, @Nonnull Level world, @Nonnull Entity entity, int itemSlot, boolean isSelected) {
         super.inventoryTick(stack, world, entity, itemSlot, isSelected);
 
 
@@ -207,7 +207,7 @@ public class Filler extends ItemEnergy {
 
     
     @Override
-    public void appendHoverText(ItemStack stack, @Nullable TooltipContext context, List<Component> tooltip, TooltipFlag flagIn) {
+    public void appendHoverText(@Nonnull ItemStack stack, @Nonnull TooltipContext context, @Nonnull List<Component> tooltip, @Nonnull TooltipFlag flagIn) {
         super.appendHoverText(stack, context, tooltip, flagIn);
 
         MutableComponent display = loadData(stack)
@@ -218,7 +218,7 @@ public class Filler extends ItemEnergy {
     }
 
     @Override
-    public int getUseDuration(ItemStack stack, LivingEntity livingEntity) {
+    public int getUseDuration(@Nonnull ItemStack stack, @Nonnull LivingEntity livingEntity) {
         return Integer.MAX_VALUE;
     }
 }

src/main/java/de/ellpeck/actuallyadditions/mod/items/ItemBattery.java

@@ -71,7 +71,7 @@ public class ItemBattery extends ItemEnergy {
 
     
     @Override
-    public void appendHoverText(ItemStack stack, @Nullable TooltipContext playerIn, List<Component> list, TooltipFlag advanced) {
+    public void appendHoverText(@Nonnull ItemStack stack, @Nonnull TooltipContext playerIn, @Nonnull List<Component> list, @Nonnull TooltipFlag advanced) {
         super.appendHoverText(stack, playerIn, list, advanced);
         list.add(Component.translatable("tooltip.actuallyadditions.battery." + (ItemUtil.isEnabled(stack)
             ? "discharge"

src/main/java/de/ellpeck/actuallyadditions/mod/items/ItemPlayerProbe.java

@@ -13,7 +13,6 @@ package de.ellpeck.actuallyadditions.mod.items;
 import de.ellpeck.actuallyadditions.mod.components.ActuallyComponents;
 import de.ellpeck.actuallyadditions.mod.items.base.ItemBase;
 import de.ellpeck.actuallyadditions.mod.tile.TileEntityPlayerInterface;
-import de.ellpeck.actuallyadditions.mod.util.StackUtil;
 import net.minecraft.network.chat.Component;
 import net.minecraft.world.InteractionHand;
 import net.minecraft.world.InteractionResult;
@@ -26,6 +25,7 @@ import net.minecraft.world.item.context.UseOnContext;
 import net.minecraft.world.level.Level;
 import net.minecraft.world.level.block.entity.BlockEntity;
 
+import javax.annotation.Nonnull;
 import java.util.List;
 import java.util.UUID;
 
@@ -37,7 +37,7 @@ public class ItemPlayerProbe extends ItemBase {
 
     // TODO: [port] might be the wrong event
     @Override
-    public void inventoryTick(ItemStack stack, Level world, Entity entity, int itemSlot, boolean isSelected) {
+    public void inventoryTick(@Nonnull ItemStack stack, Level world, @Nonnull Entity entity, int itemSlot, boolean isSelected) {
         if (!world.isClientSide) {
             UUID uuid = stack.get(ActuallyComponents.UUID);
             if (uuid != null) {
@@ -57,6 +57,7 @@ public class ItemPlayerProbe extends ItemBase {
         }
     }
 
+    @Nonnull
     @Override
     public InteractionResult useOn(UseOnContext context) {
         Player player = context.getPlayer();
@@ -84,11 +85,12 @@ public class ItemPlayerProbe extends ItemBase {
         return InteractionResult.FAIL;
     }
 
+    @Nonnull
     @Override
-    public InteractionResult interactLivingEntity(ItemStack aStack, Player player, LivingEntity entity, InteractionHand hand) {
+    public InteractionResult interactLivingEntity(@Nonnull ItemStack aStack, Player player, @Nonnull LivingEntity entity, @Nonnull InteractionHand hand) {
         if (!player.level().isClientSide) {
             ItemStack stack = player.getMainHandItem();
-            if (StackUtil.isValid(stack) && stack.getItem() == this) {
+            if (!stack.isEmpty() && stack.getItem() == this) {
                 if (entity instanceof Player playerHit) {
 
                     if (!playerHit.isShiftKeyDown()) {
@@ -104,7 +106,7 @@ public class ItemPlayerProbe extends ItemBase {
 
     
     @Override
-    public void appendHoverText(ItemStack stack, TooltipContext pContext, List<Component> tooltip, TooltipFlag advanced) {
+    public void appendHoverText(ItemStack stack, @Nonnull TooltipContext pContext, @Nonnull List<Component> tooltip, @Nonnull TooltipFlag advanced) {
         String name = stack.get(ActuallyComponents.NAME);
         if (name != null) {
             tooltip.add(Component.translatable("tooltip.actuallyadditions.playerProbe.probing").append(": " + name));

src/main/java/de/ellpeck/actuallyadditions/mod/items/ItemWaterBowl.java

@@ -39,6 +39,8 @@ import net.neoforged.bus.api.SubscribeEvent;
 import net.neoforged.neoforge.common.NeoForge;
 import net.neoforged.neoforge.event.entity.player.PlayerInteractEvent;
 
+import javax.annotation.Nonnull;
+
 public class ItemWaterBowl extends ItemBase {
 
     public ItemWaterBowl() {
@@ -68,7 +70,7 @@ public class ItemWaterBowl extends ItemBase {
                             ItemStack reduced = StackUtil.shrink(event.getItemStack(), 1);
 
                             ItemStack bowl = new ItemStack(ActuallyItems.WATER_BOWL.get());
-                            if (!StackUtil.isValid(reduced)) {
+                            if (reduced.isEmpty()) {
                                 event.getEntity().setItemInHand(event.getHand(), bowl);
                             } else if (!event.getEntity().getInventory().add(bowl.copy())) {
                                 ItemEntity entityItem = new ItemEntity(event.getLevel(), event.getEntity().getX(), event.getEntity().getY(), event.getEntity().getZ(), bowl.copy());
@@ -82,13 +84,14 @@ public class ItemWaterBowl extends ItemBase {
         }
     }
 
+    @Nonnull
     @Override
-    public InteractionResultHolder<ItemStack> use(Level world, Player player, InteractionHand hand) {
+    public InteractionResultHolder<ItemStack> use(@Nonnull Level world, Player player, @Nonnull InteractionHand hand) {
         ItemStack stack = player.getItemInHand(hand);
 
         HitResult trace = player.pick(8.0D, 1.0F, false);
 
-        if (trace == null) {
+        if (trace.getType() == HitResult.Type.MISS) {
             return InteractionResultHolder.pass(stack);
         } else if (trace.getType() != HitResult.Type.BLOCK) {
             return InteractionResultHolder.pass(stack);
@@ -117,7 +120,7 @@ public class ItemWaterBowl extends ItemBase {
     }
 
     @Override
-    public void inventoryTick(ItemStack stack, Level world, Entity entity, int itemSlot, boolean isSelected) {
+    public void inventoryTick(@Nonnull ItemStack stack, Level world, @Nonnull Entity entity, int itemSlot, boolean isSelected) {
         if (!world.isClientSide) {
             if (CommonConfig.Other.WATER_BOWL_LOSS.get()) {
                 if (world.getGameTime() % 10 == 0 && world.random.nextFloat() >= 0.5F) {
@@ -159,7 +162,7 @@ public class ItemWaterBowl extends ItemBase {
     }
 
     @Override
-    public boolean shouldCauseReequipAnimation(ItemStack oldStack, ItemStack newStack, boolean slotChanged) {
+    public boolean shouldCauseReequipAnimation(@Nonnull ItemStack oldStack, @Nonnull ItemStack newStack, boolean slotChanged) {
         return !ItemStack.isSameItem(oldStack, newStack);
     }
 

src/main/java/de/ellpeck/actuallyadditions/mod/items/ItemWaterRemovalRing.java

@@ -1,75 +0,0 @@
-/*
- * This file ("ItemWaterRemovalRing.java") is part of the Actually Additions mod for Minecraft.
- * It is created and owned by Ellpeck and distributed
- * under the Actually Additions License to be found at
- * http://ellpeck.de/actaddlicense
- * View the source code at https://github.com/Ellpeck/ActuallyAdditions
- *
- * © 2015-2017 Ellpeck
- */
-
-package de.ellpeck.actuallyadditions.mod.items;
-
-import de.ellpeck.actuallyadditions.mod.items.base.ItemEnergy;
-import de.ellpeck.actuallyadditions.mod.util.StackUtil;
-import net.minecraft.core.BlockPos;
-import net.minecraft.util.Mth;
-import net.minecraft.world.entity.Entity;
-import net.minecraft.world.entity.player.Player;
-import net.minecraft.world.item.ItemStack;
-import net.minecraft.world.level.Level;
-import net.minecraft.world.level.block.Block;
-import net.minecraft.world.level.block.Blocks;
-
-public class ItemWaterRemovalRing extends ItemEnergy {
-
-    public ItemWaterRemovalRing() {
-        super(800000, 1000);
-    }
-
-    @Override
-    public void inventoryTick(ItemStack stack, Level world, Entity player, int itemSlot, boolean isSelected) {
-        if (!(player instanceof Player) || player.level().isClientSide || player.isShiftKeyDown()) {
-            return;
-        }
-
-        ItemStack equipped = ((Player) player).getMainHandItem();
-
-        int energyUse = 150;
-        if (StackUtil.isValid(equipped) && equipped == stack && this.getEnergyStored(stack) >= energyUse) {
-
-            //Setting everything to air
-            int range = 3;
-            for (int x = -range; x < range + 1; x++) {
-                for (int z = -range; z < range + 1; z++) {
-                    for (int y = -range; y < range + 1; y++) {
-                        int theX = Mth.floor(player.getX() + x);
-                        int theY = Mth.floor(player.getY() + y);
-                        int theZ = Mth.floor(player.getZ() + z);
-
-                        //Remove Water
-                        BlockPos pos = new BlockPos(theX, theY, theZ);
-                        Block block = world.getBlockState(pos).getBlock();
-                        // TODO: Ensure water check is correct
-                        if ((block == Blocks.WATER) && this.getEnergyStored(stack) >= energyUse) {
-                            world.setBlockAndUpdate(pos, Blocks.AIR.defaultBlockState());
-
-                            if (!((Player) player).isCreative()) {
-                                this.extractEnergy(stack, energyUse, false);
-                            }
-                        }
-                        //Remove Lava
-                        // TODO: Ensure lava check is correct
-                        else if ((block == Blocks.LAVA) && this.getEnergyStored(stack) >= energyUse * 2) {
-                            world.setBlockAndUpdate(pos, Blocks.AIR.defaultBlockState());
-
-                            if (!((Player) player).isCreative()) {
-                                this.extractEnergy(stack, energyUse * 2, false);
-                            }
-                        }
-                    }
-                }
-            }
-        }
-    }
-}

src/main/java/de/ellpeck/actuallyadditions/mod/items/ItemWingsOfTheBats.java

@@ -14,7 +14,6 @@ import de.ellpeck.actuallyadditions.mod.config.values.ConfigBoolValues;
 import de.ellpeck.actuallyadditions.mod.data.PlayerData;
 import de.ellpeck.actuallyadditions.mod.items.base.ItemBase;
 import de.ellpeck.actuallyadditions.mod.network.PacketHelperServer;
-import de.ellpeck.actuallyadditions.mod.util.StackUtil;
 import net.minecraft.core.BlockPos;
 import net.minecraft.core.Direction;
 import net.minecraft.world.entity.Entity;
@@ -29,6 +28,8 @@ import net.neoforged.bus.api.SubscribeEvent;
 import net.neoforged.neoforge.event.entity.living.LivingDropsEvent;
 import net.neoforged.neoforge.event.tick.PlayerTickEvent;
 
+import javax.annotation.Nonnull;
+
 public class ItemWingsOfTheBats extends ItemBase {
 
     public static final String THE_BAT_BAT = "the bat bat";
@@ -50,7 +51,7 @@ public class ItemWingsOfTheBats extends ItemBase {
      */
     public static ItemStack getWingItem(Player player) {
         for (int i = 0; i < player.getInventory().getContainerSize(); i++) {
-            if (StackUtil.isValid(player.getInventory().getItem(i)) && player.getInventory().getItem(i).getItem() instanceof ItemWingsOfTheBats) {
+            if (!player.getInventory().getItem(i).isEmpty() && player.getInventory().getItem(i).getItem() instanceof ItemWingsOfTheBats) {
                 return player.getInventory().getItem(i);
             }
         }
@@ -58,12 +59,12 @@ public class ItemWingsOfTheBats extends ItemBase {
     }
 
     @Override
-    public boolean isBarVisible(ItemStack stack) {
+    public boolean isBarVisible(@Nonnull ItemStack stack) {
         return true;
     }
 
     @Override
-    public int getBarWidth(ItemStack stack) {
+    public int getBarWidth(@Nonnull ItemStack stack) {
 /*        PlayerEntity player = ClientProxy.getCurrentPlayer();
         if (player != null) {
 //            PlayerData.PlayerSave data = PlayerData.getDataFromPlayer(player);
@@ -74,7 +75,7 @@ public class ItemWingsOfTheBats extends ItemBase {
     }
 
     @Override
-    public int getBarColor(ItemStack stack) {
+    public int getBarColor(@Nonnull ItemStack stack) {
 /*        PlayerEntity player = ClientProxy.getCurrentPlayer();
         if (player != null) {
 //            PlayerData.PlayerSave data = PlayerData.getDataFromPlayer(player);
@@ -96,7 +97,7 @@ public class ItemWingsOfTheBats extends ItemBase {
                 Iterable<ItemStack> equip = player.getHandSlots();
                 for (ItemStack stack : equip) {
                     // Todo: [port] this might not work anymore due to the way things are checked
-                    if (StackUtil.isValid(stack) && ItemWingsOfTheBats.THE_BAT_BAT.equalsIgnoreCase(stack.getHoverName().getString()) && stack.getItem() instanceof SwordItem) {
+                    if (!stack.isEmpty() && ItemWingsOfTheBats.THE_BAT_BAT.equalsIgnoreCase(stack.getHoverName().getString()) && stack.getItem() instanceof SwordItem) {
                         looting += 3;
                         break;
                     }
@@ -121,7 +122,7 @@ public class ItemWingsOfTheBats extends ItemBase {
                     boolean tryDeduct = false;
                     boolean shouldSend = false;
 
-                    boolean wingsEquipped = StackUtil.isValid(ItemWingsOfTheBats.getWingItem(player));
+                    boolean wingsEquipped = !ItemWingsOfTheBats.getWingItem(player).isEmpty();
                     if (!data.hasBatWings) {
                         if (data.batWingsFlyTime <= 0) {
                             if (wingsEquipped) {

src/main/java/de/ellpeck/actuallyadditions/mod/items/base/ItemEnergy.java

@@ -25,6 +25,7 @@ import net.neoforged.neoforge.capabilities.Capabilities;
 import net.neoforged.neoforge.energy.EnergyStorage;
 import net.neoforged.neoforge.energy.IEnergyStorage;
 
+import javax.annotation.Nonnull;
 import java.text.NumberFormat;
 import java.util.List;
 import java.util.Optional;
@@ -46,7 +47,7 @@ public abstract class ItemEnergy extends ItemBase {
     }
 
     @Override
-    public void appendHoverText(ItemStack stack, TooltipContext context, List<Component> tooltip, TooltipFlag flagIn) {
+    public void appendHoverText(@Nonnull ItemStack stack, @Nonnull TooltipContext context, @Nonnull List<Component> tooltip, @Nonnull TooltipFlag flagIn) {
         super.appendHoverText(stack, context, tooltip, flagIn);
         IEnergyStorage storage = stack.getCapability(Capabilities.EnergyStorage.ITEM);
         if(storage != null) {

src/main/java/de/ellpeck/actuallyadditions/mod/items/lens/LensColor.java

@@ -67,7 +67,7 @@ public class LensColor extends Lens {
             for (ItemEntity item : items) {
                 if (item.isAlive() && !item.getItem().isEmpty() && tile.getEnergy() >= ENERGY_USE) {
                     ItemStack newStack = this.tryConvert(item.getItem(), tile.getWorldObject().registryAccess());
-                    if (StackUtil.isValid(newStack)) {
+                    if (!newStack.isEmpty()) {
                         item.discard();
 
                         ItemEntity newItem = new ItemEntity(tile.getWorldObject(), item.getX(), item.getY(), item.getZ(), newStack);

src/main/java/de/ellpeck/actuallyadditions/mod/items/lens/LensDisenchanting.java

@@ -13,7 +13,6 @@ package de.ellpeck.actuallyadditions.mod.items.lens;
 import de.ellpeck.actuallyadditions.api.internal.IAtomicReconstructor;
 import de.ellpeck.actuallyadditions.api.lens.Lens;
 import de.ellpeck.actuallyadditions.mod.util.ItemUtil;
-import de.ellpeck.actuallyadditions.mod.util.StackUtil;
 import net.minecraft.core.BlockPos;
 import net.minecraft.core.Direction;
 import net.minecraft.core.Holder;
@@ -45,7 +44,7 @@ public class LensDisenchanting extends Lens {
                 for (ItemEntity item : items) {
                     if (item != null && item.isAlive()) {
                         ItemStack stack = item.getItem();
-                        if (StackUtil.isValid(stack) && stack.getCount() == 1) {
+                        if (!stack.isEmpty() && stack.getCount() == 1) {
                             Item stackItem = stack.getItem();
                             if (stackItem == Items.BOOK || stackItem == Items.ENCHANTED_BOOK) {
                                 if (book == null) {
@@ -55,7 +54,7 @@ public class LensDisenchanting extends Lens {
                                 }
                             } else {
                                 ItemEnchantments enchants = stack.getAllEnchantments(tile.getWorldObject().registryAccess().lookupOrThrow(Registries.ENCHANTMENT));
-                                if (enchants != null && !enchants.isEmpty()) {
+                                if (!enchants.isEmpty()) {
                                     if (toDisenchant == null) {
                                         toDisenchant = item;
                                     } else {

src/main/java/de/ellpeck/actuallyadditions/mod/misc/apiimpl/MethodHandler.java

@@ -19,7 +19,6 @@ import de.ellpeck.actuallyadditions.mod.blocks.BlockLaserRelay;
 import de.ellpeck.actuallyadditions.mod.crafting.CoffeeIngredientRecipe;
 import de.ellpeck.actuallyadditions.mod.crafting.LaserRecipe;
 import de.ellpeck.actuallyadditions.mod.tile.TileEntityAtomicReconstructor;
-import de.ellpeck.actuallyadditions.mod.util.StackUtil;
 import net.minecraft.core.BlockPos;
 import net.minecraft.core.Direction;
 import net.minecraft.core.Holder;
@@ -228,7 +227,7 @@ public class MethodHandler implements IMethodHandler {
             List<ItemEntity> items = tile.getWorldObject().getEntitiesOfClass(ItemEntity.class, aabb);
             for (ItemEntity item : items) {
                 ItemStack stack = item.getItem();
-                if (item.isAlive() && StackUtil.isValid(stack) && !item.getPersistentData().getBoolean("aa_cnv")) {
+                if (item.isAlive() && !stack.isEmpty() && !item.getPersistentData().getBoolean("aa_cnv")) {
                     Optional<RecipeHolder<LaserRecipe>> holder = LaserRecipe.getRecipeForStack(stack);
                     if (holder.isPresent()) {
                         LaserRecipe recipe = holder.get().value();

src/main/java/de/ellpeck/actuallyadditions/mod/misc/apiimpl/farmer/MelonPumpkinFarmerBehavior.java

@@ -13,7 +13,6 @@ package de.ellpeck.actuallyadditions.mod.misc.apiimpl.farmer;
 import de.ellpeck.actuallyadditions.api.farmer.FarmerResult;
 import de.ellpeck.actuallyadditions.api.farmer.IFarmerBehavior;
 import de.ellpeck.actuallyadditions.api.internal.IFarmer;
-import de.ellpeck.actuallyadditions.mod.util.StackUtil;
 import net.minecraft.core.BlockPos;
 import net.minecraft.server.level.ServerLevel;
 import net.minecraft.world.item.Item;
@@ -35,7 +34,7 @@ public class MelonPumpkinFarmerBehavior implements IFarmerBehavior {
     public FarmerResult tryPlantSeed(ItemStack seed, Level world, BlockPos pos, IFarmer farmer) {
         int use = 350;
         if (farmer.getEnergy() >= use * 2) {
-            if (StackUtil.isValid(seed)) {
+            if (!seed.isEmpty()) {
                 Item seedItem = seed.getItem();
                 boolean isPumpkin = seedItem == Items.PUMPKIN_SEEDS;
                 if (isPumpkin || seedItem == Items.MELON_SEEDS) {

src/main/java/de/ellpeck/actuallyadditions/mod/misc/special/SpecialRenderInit.java

@@ -32,39 +32,14 @@ public class SpecialRenderInit {
         new ThreadSpecialFetcher();
     }
 
-    // TODO: [port][note] ensure that this still works with the special people stuff
     public static void parse(Properties properties) {
         for (String key : properties.stringPropertyNames()) {
-            String[] values = properties.getProperty(key).split("@");
+            String value = properties.getProperty(key);
-            if (values.length > 0) {
+            if (!value.isEmpty()) {
-                String itemName = values[0];
+                ResourceLocation resLoc = ResourceLocation.tryParse(value);
-
-                int meta;
-                try {
-                    meta = Integer.parseInt(values[1]);
-                } catch (Exception e) {
-                    meta = 0;
-                }
-
-                // TODO: remove tolowercase hack
-                ResourceLocation resLoc = ResourceLocation.tryParse(itemName.toLowerCase());
                 ItemStack stack = findItem(resLoc);
 
-                //TODO Remove this block once the transition to 1.11 is done and the special people stuff file has been converted to snake_case
+                if (!stack.isEmpty()) {
-                if (!StackUtil.isValid(stack)) {
-                    String convertedItemName = "";
-                    for (char c : itemName.toCharArray()) {
-                        if (Character.isUpperCase(c)) {
-                            convertedItemName += "_";
-                            convertedItemName += Character.toLowerCase(c);
-                        } else {
-                            convertedItemName += c;
-                        }
-                    }
-                    stack = findItem(ResourceLocation.tryParse(convertedItemName));
-                }
-
-                if (StackUtil.isValid(stack)) {
                     SPECIAL_LIST.put(key.toLowerCase(Locale.ROOT), new RenderSpecial(stack));
                 }
             }
@@ -73,14 +48,14 @@ public class SpecialRenderInit {
 
     private static ItemStack findItem(ResourceLocation resLoc) {
         if (BuiltInRegistries.ITEM.containsKey(resLoc)) {
-            Item item = BuiltInRegistries.ITEM.get(resLoc);
+            var item = BuiltInRegistries.ITEM.getOptional(resLoc);
-            if (item != null) {
+            if (item.isPresent()) {
-                return new ItemStack(item);
+                return new ItemStack(item.get());
             }
         } else if (BuiltInRegistries.BLOCK.containsKey(resLoc)) {
-            Block block = BuiltInRegistries.BLOCK.get(resLoc);
+            var block = BuiltInRegistries.BLOCK.getOptional(resLoc);
-            if (block != null) {
+            if (block.isPresent()) {
-                return new ItemStack(block);
+                return new ItemStack(block.get());
             }
         }
         return ItemStack.EMPTY;

src/main/java/de/ellpeck/actuallyadditions/mod/tile/TileEntityDisplayStand.java

@@ -45,7 +45,7 @@ public class TileEntityDisplayStand extends TileEntityInventoryBase implements I
         if (t instanceof TileEntityDisplayStand tile) {
             tile.serverTick();
 
-            if (StackUtil.isValid(tile.inv.getStackInSlot(0)) && !tile.isRedstonePowered) {
+            if (!tile.inv.getStackInSlot(0).isEmpty() && !tile.isRedstonePowered) {
                 IDisplayStandItem item = tile.convertToDisplayStandItem(tile.inv.getStackInSlot(0).getItem());
                 if (item != null) {
                     int energy = item.getUsePerTick(tile.inv.getStackInSlot(0), tile, tile.ticksElapsed);

src/main/java/de/ellpeck/actuallyadditions/mod/tile/TileEntityItemInterface.java

@@ -53,6 +53,7 @@ public class TileEntityItemInterface extends TileEntityBase {
                 return TileEntityItemInterface.this.getSlotCount();
             }
 
+            @Nonnull
             @Override
             public ItemStack getStackInSlot(int slot) {
                 IItemHandlerInfo handler = TileEntityItemInterface.this.getSwitchedIndexHandler(slot);
@@ -62,8 +63,9 @@ public class TileEntityItemInterface extends TileEntityBase {
                 return ItemStack.EMPTY;
             }
 
+            @Nonnull
             @Override
-            public ItemStack insertItem(int slot, ItemStack stack, boolean simulate) {
+            public ItemStack insertItem(int slot, @Nonnull ItemStack stack, boolean simulate) {
                 IItemHandlerInfo info = TileEntityItemInterface.this.getSwitchedIndexHandler(slot);
                 if (info != null && info.isLoaded() && TileEntityItemInterface.this.isWhitelisted(info, stack, false)) {
                     ItemStack remain = info.handler.insertItem(info.switchedIndex, stack, simulate);
@@ -76,14 +78,15 @@ public class TileEntityItemInterface extends TileEntityBase {
                 return stack;
             }
 
+            @Nonnull
             @Override
             public ItemStack extractItem(int slot, int amount, boolean simulate) {
                 ItemStack stackIn = this.getStackInSlot(slot);
-                if (StackUtil.isValid(stackIn)) {
+                if (!stackIn.isEmpty()) {
                     IItemHandlerInfo info = TileEntityItemInterface.this.getSwitchedIndexHandler(slot);
                     if (info != null && info.isLoaded() && TileEntityItemInterface.this.isWhitelisted(info, stackIn, true)) {
                         ItemStack extracted = info.handler.extractItem(info.switchedIndex, amount, simulate);
-                        if (StackUtil.isValid(extracted) && !simulate) {
+                        if (!extracted.isEmpty() && !simulate) {
                             TileEntityItemInterface.this.setChanged();
                             TileEntityItemInterface.this.doItemParticle(extracted, TileEntityItemInterface.this.connectedRelay.getBlockPos(), info.relayInQuestion.getBlockPos());
                         }
@@ -285,7 +288,7 @@ public class TileEntityItemInterface extends TileEntityBase {
         }
     }
 
-    private static class IItemHandlerInfo extends SpecificItemHandlerInfo {
+    public static class IItemHandlerInfo extends SpecificItemHandlerInfo {
 
         public final IItemHandler handler;
         public final int switchedIndex;
@@ -297,7 +300,7 @@ public class TileEntityItemInterface extends TileEntityBase {
         }
     }
 
-    private static class SpecificItemHandlerInfo {
+    public static class SpecificItemHandlerInfo {
 
         public final TileEntityLaserRelayItem relayInQuestion;
 

src/main/java/de/ellpeck/actuallyadditions/mod/tile/TileEntityLaserRelay.java

@@ -186,7 +186,7 @@ public abstract class TileEntityLaserRelay extends TileEntityInventoryBase {
 
     public int getMaxRange() {
         ItemStack upgrade = this.inv.getStackInSlot(0);
-        if (StackUtil.isValid(upgrade) && upgrade.getItem() == ActuallyItems.LASER_UPGRADE_RANGE.get()) {
+        if (!upgrade.isEmpty() && upgrade.getItem() == ActuallyItems.LASER_UPGRADE_RANGE.get()) {
             return MAX_DISTANCE_RANGED;
         } else {
             return MAX_DISTANCE;

src/main/java/de/ellpeck/actuallyadditions/mod/tile/TileEntityXPSolidifier.java

@@ -175,7 +175,7 @@ public class TileEntityXPSolidifier extends TileEntityInventoryBase implements I
             }
 
             ItemStack stack = tile.inv.getStackInSlot(1);
-            if (StackUtil.isValid(stack) && stack.getItem() instanceof ItemSolidifiedExperience) {
+            if (!stack.isEmpty() && stack.getItem() instanceof ItemSolidifiedExperience) {
                 int remainingSpace = Mth.clamp(Integer.MAX_VALUE - tile.amount, 0, stack.getCount());
                 if (stack.getCount() >= remainingSpace && remainingSpace != 0) {
                     tile.amount += remainingSpace;

src/main/java/de/ellpeck/actuallyadditions/mod/util/AssetUtil.java

@@ -45,6 +45,8 @@ import net.minecraft.world.phys.shapes.VoxelShape;
 import net.neoforged.neoforge.client.ClientHooks;
 import org.joml.Matrix4f;
 
+import javax.annotation.Nonnull;
+
 public final class AssetUtil {
 
     public static final int MAX_LIGHT_X = 0xF000F0;
@@ -94,8 +96,8 @@ public final class AssetUtil {
     //    }
 
     
-    public static void renderItemWithoutScrewingWithColors(ItemStack stack, PoseStack matrices, int combinedOverlay, int combinedLight) {
+    public static void renderItemWithoutScrewingWithColors(@Nonnull ItemStack stack, PoseStack matrices, int combinedOverlay, int combinedLight) {
-        if (StackUtil.isValid(stack)) {
+        if (!stack.isEmpty()) {
             Minecraft mc = Minecraft.getInstance();
             ItemRenderer renderer = mc.getItemRenderer();
             TextureManager manager = mc.getTextureManager();

src/main/java/de/ellpeck/actuallyadditions/mod/util/AwfulUtil.java

@@ -1,109 +0,0 @@
-// TODO: [port][note] no longer used
-///*
-// * This file ("AwfulUtil.java") is part of the Actually Additions mod for Minecraft.
-// * It is created and owned by Ellpeck and distributed
-// * under the Actually Additions License to be found at
-// * http://ellpeck.de/actaddlicense
-// * View the source code at https://github.com/Ellpeck/ActuallyAdditions
-// *
-// * © 2015-2017 Ellpeck
-// */
-//
-//package de.ellpeck.actuallyadditions.mod.util;
-//
-//import com.google.common.collect.Lists;
-//import net.minecraft.item.ItemStack;
-//import net.minecraft.loot.LootContext;
-//import net.minecraft.loot.LootTable;
-//import net.minecraft.util.math.MathHelper;
-//import net.minecraftforge.fml.loading.FMLLoader;
-//import net.minecraftforge.items.IItemHandlerModifiable;
-//
-//import java.util.Collections;
-//import java.util.Iterator;
-//import java.util.List;
-//import java.util.Random;
-//
-////This is stuff copied from somewhere in vanilla and changed so that it works properly
-////It's unpolished and vanilla-y, so don't look at it! O_O
-//public final class AwfulUtil {
-//
-//    public static void fillInventory(LootTable table, IItemHandlerModifiable inventory, Random rand, LootContext context) {
-//        List<ItemStack> list = table.generateLootForPools(rand, context);
-//        List<Integer> list1 = getEmptySlotsRandomized(inventory, rand);
-//        shuffleItems(list, list1.size(), rand);
-//
-//        for (ItemStack itemstack : list) {
-//            if (itemstack.isEmpty()) {
-//                inventory.setStackInSlot(list1.remove(list1.size() - 1), ItemStack.EMPTY);
-//            } else {
-//                inventory.setStackInSlot(list1.remove(list1.size() - 1), itemstack);
-//            }
-//        }
-//    }
-//
-//    private static void shuffleItems(List<ItemStack> stacks, int someInt, Random rand) {
-//        List<ItemStack> list = Lists.newArrayList();
-//        Iterator<ItemStack> iterator = stacks.iterator();
-//
-//        while (iterator.hasNext()) {
-//            ItemStack itemstack = iterator.next();
-//
-//            if (itemstack.isEmpty()) {
-//                iterator.remove();
-//            } else if (itemstack.getCount() > 1) {
-//                list.add(itemstack);
-//                iterator.remove();
-//            }
-//        }
-//
-//        someInt = someInt - stacks.size();
-//
-//        while (someInt > 0 && list.size() > 0) {
-//            ItemStack itemstack2 = list.remove(MathHelper.nextInt(rand, 0, list.size() - 1));
-//            int i = MathHelper.nextInt(rand, 1, itemstack2.getCount() / 2);
-//            ItemStack itemstack1 = itemstack2.split(i);
-//
-//            if (itemstack2.getCount() > 1 && rand.nextBoolean()) {
-//                list.add(itemstack2);
-//            } else {
-//                stacks.add(itemstack2);
-//            }
-//
-//            if (itemstack1.getCount() > 1 && rand.nextBoolean()) {
-//                list.add(itemstack1);
-//            } else {
-//                stacks.add(itemstack1);
-//            }
-//        }
-//
-//        stacks.addAll(list);
-//        Collections.shuffle(stacks, rand);
-//    }
-//
-//    private static List<Integer> getEmptySlotsRandomized(IItemHandlerModifiable inventory, Random rand) {
-//        List<Integer> list = Lists.newArrayList();
-//
-//        for (int i = 0; i < inventory.getSlots(); ++i) {
-//            if (inventory.getStackInSlot(i).isEmpty()) {
-//                list.add(i);
-//            }
-//        }
-//
-//        Collections.shuffle(list, rand);
-//        return list;
-//    }
-//
-//    public static void callTheFuckinPolice(Object... stuff) {
-//        int i = 0;
-//        String error = "Actually Additions: Something is very wrong.  This method was provided with ";
-//        for (Object k : stuff) {
-//            error += "\n" + i++ + ": " + (k == null
-//                ? "null"
-//                : k.getClass().getSimpleName() + " <- CLASS | INSTANCE -> " + k.toString() + ", ");
-//        }
-//        error += "\n" + "The current side is: " + FMLLoader.getDist().name();
-//        error += "\n" + "Report this to https://github.com/Ellpeck/ActuallyAdditions/issues";
-//        throw new IllegalStateException(error);
-//    }
-//}

src/main/java/de/ellpeck/actuallyadditions/mod/util/StackUtil.java

@@ -16,45 +16,9 @@ import net.minecraft.core.NonNullList;
 import net.minecraft.world.item.ItemStack;
 import net.neoforged.neoforge.items.IItemHandler;
 
-import java.util.Collection;
 import java.util.List;
 
 public final class StackUtil {
-
-    /**
-     * Pretty much just a check for {@link ItemStack#isEmpty()} but exists in case Mojang does some more refactoring.
-     *
-     * @param stack The stack
-     * @return If the stack is not empty, or if it's an IDisableableItem, if its enabled.
-     */
-    @Deprecated
-    public static boolean isValid(ItemStack stack) {
-        return stack != null && !stack.isEmpty();
-        //        if (stack == null) AwfulUtil.callTheFuckinPolice("Null ItemStack detected", stack);
-        //        Item i = stack.getItem();
-        //        if (i instanceof IDisableableItem) return !((IDisableableItem) i).isDisabled();
-        //        return !stack.isEmpty();
-    }
-
-    /**
-     * Checks if a collection of stacks are empty, as {@link Collection#isEmpty()} does not care about empty stacks.
-     *
-     * @param stacks Some ItemStacks
-     * @return If all stacks in the collection return true for {@link ItemStack#isEmpty()}
-     */
-    @Deprecated
-    public static boolean isEmpty(Collection<ItemStack> stacks) {
-        if (stacks.isEmpty()) {
-            return true;
-        }
-        for (ItemStack s : stacks) {
-            if (!s.isEmpty()) {
-                return false;
-            }
-        }
-        return true;
-    }
-
     /**
      * Checks if all provided itemstacks will fit in the AA handler.  Use addAll below to actually add the stacks.  This is strictly a check function.
      *

src/main/java/de/ellpeck/actuallyadditions/mod/util/StringUtil.java

@@ -1,61 +0,0 @@
-/*
- * This file ("StringUtil.java") is part of the Actually Additions mod for Minecraft.
- * It is created and owned by Ellpeck and distributed
- * under the Actually Additions License to be found at
- * http://ellpeck.de/actaddlicense
- * View the source code at https://github.com/Ellpeck/ActuallyAdditions
- *
- * © 2015-2017 Ellpeck
- */
-
-package de.ellpeck.actuallyadditions.mod.util;
-
-import com.mojang.blaze3d.vertex.PoseStack;
-import net.minecraft.client.gui.Font;
-import net.minecraft.client.gui.GuiGraphics;
-import net.minecraft.client.resources.language.I18n;
-
-@Deprecated
-public final class StringUtil {
-
-    /**
-     * Localizes a given formatted String with the given Replacements
-     */
-    
-    public static String localizeFormatted(String text, Object... replace) {
-        return I18n.get(text, replace);
-    }
-
-    // TODO: Move to official
-    @Deprecated
-    
-    public static void drawSplitString(Font renderer, String strg, int x, int y, int width, int color, boolean shadow) {
-//        ResourcePackList <- holds the correct way
-//        List<String> list = renderer.listFormattedStringToWidth(strg, width);
-//        for (int i = 0; i < list.size(); i++) {
-//            String s1 = list.get(i);
-//            renderer.draw(s1, x, y + i * renderer.lineHeight, color, shadow);
-//        }
-    }
-
-//    
-//    public static void renderSplitScaledAsciiString(FontRenderer font, String text, int x, int y, int color, boolean shadow, float scale, int length) {
-//        List<String> lines = font.listFormattedStringToWidth(text, (int) (length / scale));
-//        for (int i = 0; i < lines.size(); i++) {
-//            renderScaledAsciiString(font, lines.get(i), x, y + i * (int) (font.lineHeight * scale + 3), color, shadow, scale);
-//        }
-//    }
-
-    
-    public static void renderScaledString(GuiGraphics guiGraphics, Font font, String text, float x, float y, int color, boolean shadow, float scale) {
-        PoseStack matrices = guiGraphics.pose();
-        matrices.pushPose();
-        matrices.translate(x, y, 0);
-        matrices.scale(scale, scale, 1.0F);
-        if (shadow)
-            guiGraphics.drawString(font, text, 0, 0, color);
-        else
-            guiGraphics.drawString(font, text, x, y, color, false);
-        matrices.popPose();
-    }
-}

src/main/java/de/ellpeck/actuallyadditions/mod/util/WorldUtil.java

@@ -44,6 +44,7 @@ import net.neoforged.neoforge.fluids.FluidStack;
 import net.neoforged.neoforge.fluids.capability.IFluidHandler;
 import net.neoforged.neoforge.items.IItemHandler;
 
+import javax.annotation.Nonnull;
 import java.util.ArrayList;
 import java.util.List;
 
@@ -59,7 +60,7 @@ public final class WorldUtil {
 
     public static boolean doItemInteraction(SlotlessableItemHandlerWrapper extractWrapper, SlotlessableItemHandlerWrapper insertWrapper, int maxExtract, int extractSlotStart, int extractSlotEnd, int insertSlotStart, int insertSlotEnd, FilterSettings filter) {
         ItemStack theoreticalExtract = extractItem(extractWrapper, maxExtract, true, extractSlotStart, extractSlotEnd, filter);
-        if (StackUtil.isValid(theoreticalExtract)) {
+        if (!theoreticalExtract.isEmpty()) {
             ItemStack remaining = StackUtil.insertItem(insertWrapper, theoreticalExtract, false, insertSlotStart, insertSlotEnd);
             if (!ItemStack.matches(remaining, theoreticalExtract)) {
                 int toExtract = theoreticalExtract.getCount() - remaining.getCount();
@@ -95,14 +96,14 @@ public final class WorldUtil {
             }*/
         }
 
-        if (!StackUtil.isValid(extracted)) {
+        if (extracted.isEmpty()) {
             IItemHandler handler = extractWrapper.getNormalHandler();
             if (handler != null) {
                 for (int i = Math.max(0, slotStart); i < Math.min(slotEnd, handler.getSlots()); i++) {
                     if (filter == null || !filter.needsCheck() || filter.check(handler.getStackInSlot(i))) {
                         extracted = handler.extractItem(i, maxExtract, simulate);
 
-                        if (StackUtil.isValid(extracted)) {
+                        if (!extracted.isEmpty()) {
                             break;
                         }
                     }
@@ -162,8 +163,8 @@ public final class WorldUtil {
         return true;
     }
 
-    public static ItemStack useItemAtSide(Direction side, Level level, BlockPos pos, ItemStack stack) {
+    public static ItemStack useItemAtSide(Direction side, Level level, BlockPos pos, @Nonnull ItemStack stack) {
-        if (level instanceof ServerLevel && StackUtil.isValid(stack) && pos != null) {
+        if (level instanceof ServerLevel && !stack.isEmpty() && pos != null) {
             BlockPos offsetPos = pos.relative(side);
             BlockState state = level.getBlockState(offsetPos);
             boolean replaceable = state.canBeReplaced(new BlockPlaceContext(level, null, InteractionHand.MAIN_HAND, stack,