Some Nullable and NotNull annotations

Signed-off-by: shedaniel <daniel@shedaniel.me>

RoughlyEnoughItems-api/src/main/java/me/shedaniel/rei/api/REIHelper.java

@@ -32,6 +32,7 @@ import net.minecraft.client.gui.screens.inventory.AbstractContainerScreen;
 import net.minecraft.resources.ResourceLocation;
 import net.minecraft.world.item.ItemStack;
 import org.jetbrains.annotations.ApiStatus;
+import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
 import java.util.List;
@@ -59,11 +60,15 @@ public interface REIHelper {
     
     boolean isDarkThemeEnabled();
     
+    @Nullable
     TextFieldWidget getSearchTextField();
     
+    @NotNull
+    @ApiStatus.Internal
     List<ItemStack> getInventoryStacks();
     
     void queueTooltip(@Nullable Tooltip tooltip);
     
+    @NotNull
     ResourceLocation getDefaultDisplayTexture();
 }

RoughlyEnoughItems-api/src/main/java/me/shedaniel/rei/api/RecipeCategory.java

@@ -32,6 +32,7 @@ import net.fabricmc.api.EnvType;
 import net.fabricmc.api.Environment;
 import net.minecraft.resources.ResourceLocation;
 import org.jetbrains.annotations.ApiStatus;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.Collections;
 import java.util.List;
@@ -44,6 +45,7 @@ public interface RecipeCategory<T extends RecipeDisplay> {
      *
      * @return the unique identifier of the category
      */
+    @NotNull
     ResourceLocation getIdentifier();
     
     /**
@@ -51,6 +53,7 @@ public interface RecipeCategory<T extends RecipeDisplay> {
      *
      * @return the renderer of the icon
      */
+    @NotNull
     default EntryStack getLogo() {
         return EntryStack.empty();
     }
@@ -60,6 +63,7 @@ public interface RecipeCategory<T extends RecipeDisplay> {
      *
      * @return the name
      */
+    @NotNull
     String getCategoryName();
     
     /**
@@ -69,6 +73,7 @@ public interface RecipeCategory<T extends RecipeDisplay> {
      * @return the recipe renderer
      */
     @ApiStatus.OverrideOnly
+    @NotNull
     default RecipeEntry getSimpleRenderer(T recipe) {
         return SimpleRecipeEntry.from(recipe::getInputEntries, recipe::getResultingEntries);
     }
@@ -81,6 +86,7 @@ public interface RecipeCategory<T extends RecipeDisplay> {
      * @return the list of widgets
      */
     @ApiStatus.OverrideOnly
+    @NotNull
     default List<Widget> setupDisplay(T recipeDisplay, Rectangle bounds) {
         return Collections.singletonList(Widgets.createCategoryBase(bounds));
     }

RoughlyEnoughItems-api/src/main/java/me/shedaniel/rei/api/RecipeDisplay.java

@@ -26,6 +26,7 @@ package me.shedaniel.rei.api;
 import me.shedaniel.rei.utils.CollectionUtils;
 import net.minecraft.resources.ResourceLocation;
 import org.jetbrains.annotations.ApiStatus;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.Collections;
 import java.util.List;
@@ -36,6 +37,7 @@ public interface RecipeDisplay {
     /**
      * @return a list of inputs
      */
+    @NotNull
     List<List<EntryStack>> getInputEntries();
     
     /**
@@ -43,6 +45,7 @@ public interface RecipeDisplay {
      */
     @Deprecated
     @ApiStatus.ScheduledForRemoval
+    @NotNull
     default List<EntryStack> getOutputEntries() {
         return Collections.emptyList();
     }
@@ -50,6 +53,7 @@ public interface RecipeDisplay {
     /**
      * @return a list of outputs
      */
+    @NotNull
     default List<List<EntryStack>> getResultingEntries() {
         return CollectionUtils.map(getOutputEntries(), Collections::singletonList);
     }
@@ -59,6 +63,7 @@ public interface RecipeDisplay {
      *
      * @return the list of required items
      */
+    @NotNull
     default List<List<EntryStack>> getRequiredEntries() {
         return Collections.emptyList();
     }
@@ -68,6 +73,7 @@ public interface RecipeDisplay {
      *
      * @return the identifier of the category
      */
+    @NotNull
     ResourceLocation getRecipeCategory();
     
     /**
@@ -75,6 +81,7 @@ public interface RecipeDisplay {
      *
      * @return the recipe location
      */
+    @NotNull
     default Optional<ResourceLocation> getRecipeLocation() {
         return Optional.empty();
     }

RoughlyEnoughItems-default-plugin/src/main/java/me/shedaniel/rei/plugin/beacon/DefaultBeaconBaseCategory.java

@@ -53,22 +53,22 @@ import java.util.Objects;
 
 public class DefaultBeaconBaseCategory implements RecipeCategory<DefaultBeaconBaseDisplay> {
     @Override
-    public ResourceLocation getIdentifier() {
+    public @NotNull ResourceLocation getIdentifier() {
         return DefaultPlugin.BEACON;
     }
     
     @Override
-    public String getCategoryName() {
+    public @NotNull String getCategoryName() {
         return I18n.get("category.rei.beacon_base");
     }
     
     @Override
-    public EntryStack getLogo() {
+    public @NotNull EntryStack getLogo() {
         return EntryStack.create(Blocks.BEACON);
     }
     
     @Override
-    public RecipeEntry getSimpleRenderer(DefaultBeaconBaseDisplay recipe) {
+    public @NotNull RecipeEntry getSimpleRenderer(DefaultBeaconBaseDisplay recipe) {
         String name = getCategoryName();
         return new RecipeEntry() {
             @Override
@@ -84,7 +84,7 @@ public class DefaultBeaconBaseCategory implements RecipeCategory<DefaultBeaconBa
     }
     
     @Override
-    public List<Widget> setupDisplay(DefaultBeaconBaseDisplay display, Rectangle bounds) {
+    public @NotNull List<Widget> setupDisplay(DefaultBeaconBaseDisplay display, Rectangle bounds) {
         List<Widget> widgets = Lists.newArrayList();
         widgets.add(Widgets.createSlot(new Point(bounds.getCenterX() - 8, bounds.y + 3)).entry(getLogo()));
         Rectangle rectangle = new Rectangle(bounds.getCenterX() - (bounds.width / 2) - 1, bounds.y + 23, bounds.width + 2, bounds.height - 28);

RoughlyEnoughItems-default-plugin/src/main/java/me/shedaniel/rei/plugin/beacon/DefaultBeaconBaseDisplay.java

@@ -30,6 +30,7 @@ import net.fabricmc.api.EnvType;
 import net.fabricmc.api.Environment;
 import net.minecraft.resources.ResourceLocation;
 import net.minecraft.world.item.ItemStack;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.Collections;
 import java.util.List;
@@ -44,7 +45,7 @@ public class DefaultBeaconBaseDisplay implements RecipeDisplay {
     }
     
     @Override
-    public List<List<EntryStack>> getInputEntries() {
+    public @NotNull List<List<EntryStack>> getInputEntries() {
         return Collections.singletonList(entries);
     }
     
@@ -53,12 +54,12 @@ public class DefaultBeaconBaseDisplay implements RecipeDisplay {
     }
     
     @Override
-    public List<List<EntryStack>> getResultingEntries() {
+    public @NotNull List<List<EntryStack>> getResultingEntries() {
         return Collections.emptyList();
     }
     
     @Override
-    public ResourceLocation getRecipeCategory() {
+    public @NotNull ResourceLocation getRecipeCategory() {
         return DefaultPlugin.BEACON;
     }
 }

RoughlyEnoughItems-default-plugin/src/main/java/me/shedaniel/rei/plugin/blasting/DefaultBlastingDisplay.java

@@ -29,6 +29,7 @@ import net.fabricmc.api.EnvType;
 import net.fabricmc.api.Environment;
 import net.minecraft.resources.ResourceLocation;
 import net.minecraft.world.item.crafting.BlastingRecipe;
+import org.jetbrains.annotations.NotNull;
 
 @Environment(EnvType.CLIENT)
 public class DefaultBlastingDisplay extends DefaultCookingDisplay {
@@ -38,7 +39,7 @@ public class DefaultBlastingDisplay extends DefaultCookingDisplay {
     }
     
     @Override
-    public ResourceLocation getRecipeCategory() {
+    public @NotNull ResourceLocation getRecipeCategory() {
         return DefaultPlugin.BLASTING;
     }
 }

RoughlyEnoughItems-default-plugin/src/main/java/me/shedaniel/rei/plugin/brewing/DefaultBrewingCategory.java

@@ -40,6 +40,7 @@ import net.minecraft.resources.ResourceLocation;
 import net.minecraft.util.Mth;
 import net.minecraft.world.item.Items;
 import net.minecraft.world.level.block.Blocks;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.List;
 
@@ -47,22 +48,22 @@ import java.util.List;
 public class DefaultBrewingCategory implements RecipeCategory<DefaultBrewingDisplay> {
     
     @Override
-    public ResourceLocation getIdentifier() {
+    public @NotNull ResourceLocation getIdentifier() {
         return DefaultPlugin.BREWING;
     }
     
     @Override
-    public EntryStack getLogo() {
+    public @NotNull EntryStack getLogo() {
         return EntryStack.create(Blocks.BREWING_STAND);
     }
     
     @Override
-    public String getCategoryName() {
+    public @NotNull String getCategoryName() {
         return I18n.get("category.rei.brewing");
     }
     
     @Override
-    public List<Widget> setupDisplay(DefaultBrewingDisplay display, Rectangle bounds) {
+    public @NotNull List<Widget> setupDisplay(DefaultBrewingDisplay display, Rectangle bounds) {
         Point startPoint = new Point(bounds.getCenterX() - 52, bounds.getCenterY() - 29);
         List<Widget> widgets = Lists.newArrayList();
         widgets.add(Widgets.createRecipeBase(bounds));

RoughlyEnoughItems-default-plugin/src/main/java/me/shedaniel/rei/plugin/brewing/DefaultBrewingDisplay.java

@@ -35,6 +35,7 @@ import net.minecraft.resources.ResourceLocation;
 import net.minecraft.world.item.ItemStack;
 import net.minecraft.world.item.crafting.Ingredient;
 import org.jetbrains.annotations.ApiStatus;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.ArrayList;
 import java.util.Collections;
@@ -60,17 +61,17 @@ public class DefaultBrewingDisplay implements RecipeDisplay {
     }
     
     @Override
-    public List<List<EntryStack>> getInputEntries() {
+    public @NotNull List<List<EntryStack>> getInputEntries() {
         return Lists.newArrayList(Collections.singletonList(input), reactant);
     }
     
     @Override
-    public List<List<EntryStack>> getResultingEntries() {
+    public @NotNull List<List<EntryStack>> getResultingEntries() {
         return Collections.singletonList(Collections.singletonList(output));
     }
     
     @Override
-    public ResourceLocation getRecipeCategory() {
+    public @NotNull ResourceLocation getRecipeCategory() {
         return DefaultPlugin.BREWING;
     }
     
@@ -84,7 +85,7 @@ public class DefaultBrewingDisplay implements RecipeDisplay {
     }
     
     @Override
-    public List<List<EntryStack>> getRequiredEntries() {
+    public @NotNull List<List<EntryStack>> getRequiredEntries() {
         return getInputEntries();
     }
 }

RoughlyEnoughItems-default-plugin/src/main/java/me/shedaniel/rei/plugin/campfire/DefaultCampfireCategory.java

@@ -35,6 +35,7 @@ import net.minecraft.client.resources.language.I18n;
 import net.minecraft.network.chat.TranslatableComponent;
 import net.minecraft.resources.ResourceLocation;
 import net.minecraft.world.level.block.Blocks;
+import org.jetbrains.annotations.NotNull;
 
 import java.text.DecimalFormat;
 import java.util.List;
@@ -42,22 +43,22 @@ import java.util.List;
 public class DefaultCampfireCategory implements RecipeCategory<DefaultCampfireDisplay> {
     
     @Override
-    public ResourceLocation getIdentifier() {
+    public @NotNull ResourceLocation getIdentifier() {
         return DefaultPlugin.CAMPFIRE;
     }
     
     @Override
-    public EntryStack getLogo() {
+    public @NotNull EntryStack getLogo() {
         return EntryStack.create(Blocks.CAMPFIRE);
     }
     
     @Override
-    public String getCategoryName() {
+    public @NotNull String getCategoryName() {
         return I18n.get("category.rei.campfire");
     }
     
     @Override
-    public List<Widget> setupDisplay(DefaultCampfireDisplay display, Rectangle bounds) {
+    public @NotNull List<Widget> setupDisplay(DefaultCampfireDisplay display, Rectangle bounds) {
         Point startPoint = new Point(bounds.getCenterX() - 41, bounds.y + 10);
         final double cookingTime = display.getCookTime();
         DecimalFormat df = new DecimalFormat("###.##");

RoughlyEnoughItems-default-plugin/src/main/java/me/shedaniel/rei/plugin/campfire/DefaultCampfireDisplay.java

@@ -34,6 +34,7 @@ import net.minecraft.world.item.ItemStack;
 import net.minecraft.world.item.crafting.AbstractCookingRecipe;
 import net.minecraft.world.item.crafting.CampfireCookingRecipe;
 import net.minecraft.world.item.crafting.Ingredient;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.Collections;
 import java.util.List;
@@ -63,27 +64,27 @@ public class DefaultCampfireDisplay implements RecipeDisplay {
     }
     
     @Override
-    public Optional<ResourceLocation> getRecipeLocation() {
+    public @NotNull Optional<ResourceLocation> getRecipeLocation() {
         return Optional.ofNullable(display).map(AbstractCookingRecipe::getId);
     }
     
     @Override
-    public List<List<EntryStack>> getInputEntries() {
+    public @NotNull List<List<EntryStack>> getInputEntries() {
         return inputs;
     }
     
     @Override
-    public List<List<EntryStack>> getResultingEntries() {
+    public @NotNull List<List<EntryStack>> getResultingEntries() {
         return Collections.singletonList(output);
     }
     
     @Override
-    public List<List<EntryStack>> getRequiredEntries() {
+    public @NotNull List<List<EntryStack>> getRequiredEntries() {
         return inputs;
     }
     
     @Override
-    public ResourceLocation getRecipeCategory() {
+    public @NotNull ResourceLocation getRecipeCategory() {
         return DefaultPlugin.CAMPFIRE;
     }
     

RoughlyEnoughItems-default-plugin/src/main/java/me/shedaniel/rei/plugin/composting/DefaultCompostingCategory.java

@@ -43,6 +43,7 @@ import net.minecraft.network.chat.TranslatableComponent;
 import net.minecraft.resources.ResourceLocation;
 import net.minecraft.util.Mth;
 import net.minecraft.world.level.block.Blocks;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.*;
 
@@ -50,22 +51,22 @@ import java.util.*;
 public class DefaultCompostingCategory implements RecipeCategory<DefaultCompostingDisplay> {
     
     @Override
-    public ResourceLocation getIdentifier() {
+    public @NotNull ResourceLocation getIdentifier() {
         return DefaultPlugin.COMPOSTING;
     }
     
     @Override
-    public EntryStack getLogo() {
+    public @NotNull EntryStack getLogo() {
         return EntryStack.create(Blocks.COMPOSTER);
     }
     
     @Override
-    public String getCategoryName() {
+    public @NotNull String getCategoryName() {
         return I18n.get("category.rei.composting");
     }
     
     @Override
-    public RecipeEntry getSimpleRenderer(DefaultCompostingDisplay recipe) {
+    public @NotNull RecipeEntry getSimpleRenderer(DefaultCompostingDisplay recipe) {
         return new RecipeEntry() {
             private Component text = new TranslatableComponent("text.rei.composting.page", recipe.getPage() + 1);
             
@@ -82,7 +83,7 @@ public class DefaultCompostingCategory implements RecipeCategory<DefaultComposti
     }
     
     @Override
-    public List<Widget> setupDisplay(DefaultCompostingDisplay display, Rectangle bounds) {
+    public @NotNull List<Widget> setupDisplay(DefaultCompostingDisplay display, Rectangle bounds) {
         List<Widget> widgets = Lists.newArrayList();
         Point startingPoint = new Point(bounds.x + bounds.width - 55, bounds.y + 110);
         List<EntryStack> stacks = new ArrayList<>(display.getRequiredEntries().get(0));

RoughlyEnoughItems-default-plugin/src/main/java/me/shedaniel/rei/plugin/composting/DefaultCompostingDisplay.java

@@ -32,6 +32,7 @@ import net.fabricmc.api.Environment;
 import net.minecraft.resources.ResourceLocation;
 import net.minecraft.world.item.ItemStack;
 import net.minecraft.world.level.ItemLike;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.Collections;
 import java.util.List;
@@ -56,7 +57,7 @@ public class DefaultCompostingDisplay implements RecipeDisplay {
     }
     
     @Override
-    public List<List<EntryStack>> getInputEntries() {
+    public @NotNull List<List<EntryStack>> getInputEntries() {
         return CollectionUtils.map(order, Collections::singletonList);
     }
     
@@ -65,17 +66,17 @@ public class DefaultCompostingDisplay implements RecipeDisplay {
     }
     
     @Override
-    public List<List<EntryStack>> getResultingEntries() {
+    public @NotNull List<List<EntryStack>> getResultingEntries() {
         return Collections.singletonList(output);
     }
     
     @Override
-    public ResourceLocation getRecipeCategory() {
+    public @NotNull ResourceLocation getRecipeCategory() {
         return DefaultPlugin.COMPOSTING;
     }
     
     @Override
-    public List<List<EntryStack>> getRequiredEntries() {
+    public @NotNull List<List<EntryStack>> getRequiredEntries() {
         return Collections.singletonList(order);
     }
 }

RoughlyEnoughItems-default-plugin/src/main/java/me/shedaniel/rei/plugin/cooking/DefaultCookingCategory.java

@@ -38,6 +38,7 @@ import net.minecraft.client.gui.GuiComponent;
 import net.minecraft.client.resources.language.I18n;
 import net.minecraft.network.chat.TranslatableComponent;
 import net.minecraft.resources.ResourceLocation;
+import org.jetbrains.annotations.NotNull;
 
 import java.text.DecimalFormat;
 import java.util.Collections;
@@ -66,7 +67,7 @@ public class DefaultCookingCategory implements TransferRecipeCategory<DefaultCoo
     }
     
     @Override
-    public List<Widget> setupDisplay(DefaultCookingDisplay display, Rectangle bounds) {
+    public @NotNull List<Widget> setupDisplay(DefaultCookingDisplay display, Rectangle bounds) {
         Point startPoint = new Point(bounds.getCenterX() - 41, bounds.y + 10);
         double cookingTime = display.getCookingTime();
         DecimalFormat df = new DecimalFormat("###.##");
@@ -83,7 +84,7 @@ public class DefaultCookingCategory implements TransferRecipeCategory<DefaultCoo
     }
     
     @Override
-    public RecipeEntry getSimpleRenderer(DefaultCookingDisplay recipe) {
+    public @NotNull RecipeEntry getSimpleRenderer(DefaultCookingDisplay recipe) {
         return SimpleRecipeEntry.from(Collections.singletonList(recipe.getInputEntries().get(0)), recipe.getResultingEntries());
     }
     
@@ -93,17 +94,17 @@ public class DefaultCookingCategory implements TransferRecipeCategory<DefaultCoo
     }
     
     @Override
-    public ResourceLocation getIdentifier() {
+    public @NotNull ResourceLocation getIdentifier() {
         return identifier;
     }
     
     @Override
-    public EntryStack getLogo() {
+    public @NotNull EntryStack getLogo() {
         return logo;
     }
     
     @Override
-    public String getCategoryName() {
+    public @NotNull String getCategoryName() {
         return I18n.get(categoryName);
     }
 }

RoughlyEnoughItems-default-plugin/src/main/java/me/shedaniel/rei/plugin/cooking/DefaultCookingDisplay.java

@@ -36,6 +36,7 @@ import net.minecraft.world.item.Item;
 import net.minecraft.world.item.crafting.AbstractCookingRecipe;
 import net.minecraft.world.level.block.entity.FurnaceBlockEntity;
 import org.jetbrains.annotations.ApiStatus;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.Collections;
 import java.util.List;
@@ -69,22 +70,22 @@ public abstract class DefaultCookingDisplay implements TransferRecipeDisplay {
     }
     
     @Override
-    public Optional<ResourceLocation> getRecipeLocation() {
+    public @NotNull Optional<ResourceLocation> getRecipeLocation() {
         return Optional.ofNullable(recipe).map(AbstractCookingRecipe::getId);
     }
     
     @Override
-    public List<List<EntryStack>> getInputEntries() {
+    public @NotNull List<List<EntryStack>> getInputEntries() {
         return input;
     }
     
     @Override
-    public List<List<EntryStack>> getResultingEntries() {
+    public @NotNull List<List<EntryStack>> getResultingEntries() {
         return Collections.singletonList(output);
     }
     
     @Override
-    public List<List<EntryStack>> getRequiredEntries() {
+    public @NotNull List<List<EntryStack>> getRequiredEntries() {
         return input;
     }
     

RoughlyEnoughItems-default-plugin/src/main/java/me/shedaniel/rei/plugin/crafting/DefaultCraftingCategory.java

@@ -43,6 +43,7 @@ import net.minecraft.resources.ResourceLocation;
 import net.minecraft.util.Mth;
 import net.minecraft.world.inventory.AbstractContainerMenu;
 import net.minecraft.world.level.block.Blocks;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.List;
 
@@ -55,22 +56,22 @@ public class DefaultCraftingCategory implements TransferRecipeCategory<DefaultCr
     }
     
     @Override
-    public ResourceLocation getIdentifier() {
+    public @NotNull ResourceLocation getIdentifier() {
         return DefaultPlugin.CRAFTING;
     }
     
     @Override
-    public EntryStack getLogo() {
+    public @NotNull EntryStack getLogo() {
         return EntryStack.create(Blocks.CRAFTING_TABLE);
     }
     
     @Override
-    public String getCategoryName() {
+    public @NotNull String getCategoryName() {
         return I18n.get("category.rei.crafting");
     }
     
     @Override
-    public List<Widget> setupDisplay(DefaultCraftingDisplay display, Rectangle bounds) {
+    public @NotNull List<Widget> setupDisplay(DefaultCraftingDisplay display, Rectangle bounds) {
         Point startPoint = new Point(bounds.getCenterX() - 58, bounds.getCenterY() - 27);
         List<Widget> widgets = Lists.newArrayList();
         widgets.add(Widgets.createRecipeBase(bounds));

RoughlyEnoughItems-default-plugin/src/main/java/me/shedaniel/rei/plugin/crafting/DefaultCraftingDisplay.java

@@ -33,6 +33,7 @@ import net.fabricmc.api.Environment;
 import net.minecraft.resources.ResourceLocation;
 import net.minecraft.world.inventory.AbstractContainerMenu;
 import net.minecraft.world.item.crafting.Recipe;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.Collections;
 import java.util.List;
@@ -42,7 +43,7 @@ import java.util.Optional;
 public interface DefaultCraftingDisplay extends TransferRecipeDisplay {
     
     @Override
-    default ResourceLocation getRecipeCategory() {
+    default @NotNull ResourceLocation getRecipeCategory() {
         return DefaultPlugin.CRAFTING;
     }
     

RoughlyEnoughItems-default-plugin/src/main/java/me/shedaniel/rei/plugin/crafting/DefaultCustomDisplay.java

@@ -31,6 +31,7 @@ import net.fabricmc.api.Environment;
 import net.minecraft.resources.ResourceLocation;
 import net.minecraft.world.item.ItemStack;
 import net.minecraft.world.item.crafting.Recipe;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.Collections;
 import java.util.List;
@@ -75,22 +76,22 @@ public class DefaultCustomDisplay implements DefaultCraftingDisplay {
     }
     
     @Override
-    public Optional<ResourceLocation> getRecipeLocation() {
+    public @NotNull Optional<ResourceLocation> getRecipeLocation() {
         return getRecipe().map(Recipe::getId);
     }
     
     @Override
-    public List<List<EntryStack>> getInputEntries() {
+    public @NotNull List<List<EntryStack>> getInputEntries() {
         return input;
     }
     
     @Override
-    public List<List<EntryStack>> getResultingEntries() {
+    public @NotNull List<List<EntryStack>> getResultingEntries() {
         return Collections.singletonList(output);
     }
     
     @Override
-    public List<List<EntryStack>> getRequiredEntries() {
+    public @NotNull List<List<EntryStack>> getRequiredEntries() {
         return input;
     }
     

RoughlyEnoughItems-default-plugin/src/main/java/me/shedaniel/rei/plugin/crafting/DefaultShapedDisplay.java

@@ -29,6 +29,7 @@ import net.fabricmc.api.Environment;
 import net.minecraft.resources.ResourceLocation;
 import net.minecraft.world.item.crafting.Recipe;
 import net.minecraft.world.item.crafting.ShapedRecipe;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.Collections;
 import java.util.List;
@@ -48,22 +49,22 @@ public class DefaultShapedDisplay implements DefaultCraftingDisplay {
     }
     
     @Override
-    public Optional<ResourceLocation> getRecipeLocation() {
+    public @NotNull Optional<ResourceLocation> getRecipeLocation() {
         return Optional.ofNullable(display).map(ShapedRecipe::getId);
     }
     
     @Override
-    public List<List<EntryStack>> getInputEntries() {
+    public @NotNull List<List<EntryStack>> getInputEntries() {
         return input;
     }
     
     @Override
-    public List<List<EntryStack>> getResultingEntries() {
+    public @NotNull List<List<EntryStack>> getResultingEntries() {
         return Collections.singletonList(output);
     }
     
     @Override
-    public List<List<EntryStack>> getRequiredEntries() {
+    public @NotNull List<List<EntryStack>> getRequiredEntries() {
         return input;
     }
     

RoughlyEnoughItems-default-plugin/src/main/java/me/shedaniel/rei/plugin/crafting/DefaultShapelessDisplay.java

@@ -29,6 +29,7 @@ import net.fabricmc.api.Environment;
 import net.minecraft.resources.ResourceLocation;
 import net.minecraft.world.item.crafting.Recipe;
 import net.minecraft.world.item.crafting.ShapelessRecipe;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.Collections;
 import java.util.List;
@@ -53,22 +54,22 @@ public class DefaultShapelessDisplay implements DefaultCraftingDisplay {
     }
     
     @Override
-    public Optional<ResourceLocation> getRecipeLocation() {
+    public @NotNull Optional<ResourceLocation> getRecipeLocation() {
         return Optional.ofNullable(display).map(ShapelessRecipe::getId);
     }
     
     @Override
-    public List<List<EntryStack>> getInputEntries() {
+    public @NotNull List<List<EntryStack>> getInputEntries() {
         return input;
     }
     
     @Override
-    public List<List<EntryStack>> getResultingEntries() {
+    public @NotNull List<List<EntryStack>> getResultingEntries() {
         return Collections.singletonList(output);
     }
     
     @Override
-    public List<List<EntryStack>> getRequiredEntries() {
+    public @NotNull List<List<EntryStack>> getRequiredEntries() {
         return input;
     }
     

RoughlyEnoughItems-default-plugin/src/main/java/me/shedaniel/rei/plugin/fuel/DefaultFuelCategory.java

@@ -42,6 +42,7 @@ import net.minecraft.client.resources.language.I18n;
 import net.minecraft.network.chat.TranslatableComponent;
 import net.minecraft.resources.ResourceLocation;
 import net.minecraft.world.item.Items;
+import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
 import java.text.DecimalFormat;
@@ -53,12 +54,12 @@ public class DefaultFuelCategory implements RecipeCategory<DefaultFuelDisplay> {
     private static final DecimalFormat DECIMAL_FORMAT = new DecimalFormat("#.##");
     
     @Override
-    public ResourceLocation getIdentifier() {
+    public @NotNull ResourceLocation getIdentifier() {
         return DefaultPlugin.FUEL;
     }
     
     @Override
-    public String getCategoryName() {
+    public @NotNull String getCategoryName() {
         return I18n.get("category.rei.fuel");
     }
     
@@ -68,12 +69,12 @@ public class DefaultFuelCategory implements RecipeCategory<DefaultFuelDisplay> {
     }
     
     @Override
-    public EntryStack getLogo() {
+    public @NotNull EntryStack getLogo() {
         return EntryStack.create(Items.COAL);
     }
     
     @Override
-    public List<Widget> setupDisplay(DefaultFuelDisplay recipeDisplay, Rectangle bounds) {
+    public @NotNull List<Widget> setupDisplay(DefaultFuelDisplay recipeDisplay, Rectangle bounds) {
         Point startPoint = new Point(bounds.getCenterX() - 41, bounds.getCenterY() - 17);
         String burnItems = DECIMAL_FORMAT.format(recipeDisplay.getFuelTime() / 200d);
         List<Widget> widgets = Lists.newArrayList();
@@ -86,7 +87,7 @@ public class DefaultFuelCategory implements RecipeCategory<DefaultFuelDisplay> {
     }
     
     @Override
-    public RecipeEntry getSimpleRenderer(DefaultFuelDisplay recipe) {
+    public @NotNull RecipeEntry getSimpleRenderer(DefaultFuelDisplay recipe) {
         Slot slot = Widgets.createSlot(new Point(0, 0)).entries(recipe.getInputEntries().get(0)).disableBackground().disableHighlight();
         String burnItems = DECIMAL_FORMAT.format(recipe.getFuelTime() / 200d);
         return new RecipeEntry() {

RoughlyEnoughItems-default-plugin/src/main/java/me/shedaniel/rei/plugin/fuel/DefaultFuelDisplay.java

@@ -29,6 +29,7 @@ import me.shedaniel.rei.plugin.DefaultPlugin;
 import net.fabricmc.api.EnvType;
 import net.fabricmc.api.Environment;
 import net.minecraft.resources.ResourceLocation;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.Collections;
 import java.util.List;
@@ -44,17 +45,17 @@ public class DefaultFuelDisplay implements RecipeDisplay {
     }
     
     @Override
-    public List<List<EntryStack>> getInputEntries() {
+    public @NotNull List<List<EntryStack>> getInputEntries() {
         return Collections.singletonList(Collections.singletonList(fuel));
     }
     
     @Override
-    public List<List<EntryStack>> getResultingEntries() {
+    public @NotNull List<List<EntryStack>> getResultingEntries() {
         return Collections.emptyList();
     }
     
     @Override
-    public ResourceLocation getRecipeCategory() {
+    public @NotNull ResourceLocation getRecipeCategory() {
         return DefaultPlugin.FUEL;
     }
     

RoughlyEnoughItems-default-plugin/src/main/java/me/shedaniel/rei/plugin/information/DefaultInformationCategory.java

@@ -71,17 +71,17 @@ public class DefaultInformationCategory implements RecipeCategory<DefaultInforma
     }
     
     @Override
-    public ResourceLocation getIdentifier() {
+    public @NotNull ResourceLocation getIdentifier() {
         return DefaultPlugin.INFO;
     }
     
     @Override
-    public String getCategoryName() {
+    public @NotNull String getCategoryName() {
         return I18n.get("category.rei.information");
     }
     
     @Override
-    public RecipeEntry getSimpleRenderer(DefaultInformationDisplay recipe) {
+    public @NotNull RecipeEntry getSimpleRenderer(DefaultInformationDisplay recipe) {
         FormattedCharSequence name = recipe.getName().getVisualOrderText();
         return new RecipeEntry() {
             @Override
@@ -97,7 +97,7 @@ public class DefaultInformationCategory implements RecipeCategory<DefaultInforma
     }
     
     @Override
-    public EntryStack getLogo() {
+    public @NotNull EntryStack getLogo() {
         return new RenderingEntry() {
             @Override
             public void render(PoseStack matrices, Rectangle bounds, int mouseX, int mouseY, float delta) {
@@ -112,7 +112,7 @@ public class DefaultInformationCategory implements RecipeCategory<DefaultInforma
     }
     
     @Override
-    public List<Widget> setupDisplay(DefaultInformationDisplay recipeDisplay, Rectangle bounds) {
+    public @NotNull List<Widget> setupDisplay(DefaultInformationDisplay recipeDisplay, Rectangle bounds) {
         List<Widget> widgets = Lists.newArrayList();
         widgets.add(Widgets.createLabel(new Point(bounds.getCenterX(), bounds.y + 3), recipeDisplay.getName()).noShadow().color(0xFF404040, 0xFFBBBBBB));
         widgets.add(Widgets.createSlot(new Point(bounds.getCenterX() - 8, bounds.y + 15)).entries(recipeDisplay.getEntryStacks()));

RoughlyEnoughItems-default-plugin/src/main/java/me/shedaniel/rei/plugin/information/DefaultInformationDisplay.java

@@ -31,6 +31,7 @@ import net.fabricmc.api.EnvType;
 import net.fabricmc.api.Environment;
 import net.minecraft.network.chat.Component;
 import net.minecraft.resources.ResourceLocation;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.Arrays;
 import java.util.Collection;
@@ -58,12 +59,12 @@ public class DefaultInformationDisplay implements RecipeDisplay {
     }
     
     @Override
-    public List<List<EntryStack>> getInputEntries() {
+    public @NotNull List<List<EntryStack>> getInputEntries() {
         return Collections.singletonList(entryStacks);
     }
     
     @Override
-    public List<List<EntryStack>> getResultingEntries() {
+    public @NotNull List<List<EntryStack>> getResultingEntries() {
         return Collections.singletonList(entryStacks);
     }
     
@@ -95,7 +96,7 @@ public class DefaultInformationDisplay implements RecipeDisplay {
     }
     
     @Override
-    public ResourceLocation getRecipeCategory() {
+    public @NotNull ResourceLocation getRecipeCategory() {
         return DefaultPlugin.INFO;
     }
 }

RoughlyEnoughItems-default-plugin/src/main/java/me/shedaniel/rei/plugin/pathing/DefaultPathingCategory.java

@@ -34,28 +34,29 @@ import me.shedaniel.rei.plugin.DefaultPlugin;
 import net.minecraft.client.resources.language.I18n;
 import net.minecraft.resources.ResourceLocation;
 import net.minecraft.world.item.Items;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.List;
 
 public class DefaultPathingCategory implements RecipeCategory<DefaultPathingDisplay> {
     
     @Override
-    public ResourceLocation getIdentifier() {
+    public @NotNull ResourceLocation getIdentifier() {
         return DefaultPlugin.PATHING;
     }
     
     @Override
-    public EntryStack getLogo() {
+    public @NotNull EntryStack getLogo() {
         return EntryStack.create(Items.IRON_SHOVEL);
     }
     
     @Override
-    public String getCategoryName() {
+    public @NotNull String getCategoryName() {
         return I18n.get("category.rei.pathing");
     }
     
     @Override
-    public List<Widget> setupDisplay(DefaultPathingDisplay recipeDisplay, Rectangle bounds) {
+    public @NotNull List<Widget> setupDisplay(DefaultPathingDisplay recipeDisplay, Rectangle bounds) {
         Point startPoint = new Point(bounds.getCenterX() - 41, bounds.getCenterY() - 13);
         List<Widget> widgets = Lists.newArrayList();
         widgets.add(Widgets.createRecipeBase(bounds));

RoughlyEnoughItems-default-plugin/src/main/java/me/shedaniel/rei/plugin/pathing/DefaultPathingDisplay.java

@@ -30,6 +30,7 @@ import net.fabricmc.api.EnvType;
 import net.fabricmc.api.Environment;
 import net.minecraft.resources.ResourceLocation;
 import net.minecraft.world.item.ItemStack;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.Collections;
 import java.util.List;
@@ -57,22 +58,22 @@ public class DefaultPathingDisplay implements RecipeDisplay {
     }
     
     @Override
-    public List<List<EntryStack>> getInputEntries() {
+    public @NotNull List<List<EntryStack>> getInputEntries() {
         return Collections.singletonList(Collections.singletonList(in));
     }
     
     @Override
-    public List<List<EntryStack>> getResultingEntries() {
+    public @NotNull List<List<EntryStack>> getResultingEntries() {
         return Collections.singletonList(Collections.singletonList(out));
     }
     
     @Override
-    public ResourceLocation getRecipeCategory() {
+    public @NotNull ResourceLocation getRecipeCategory() {
         return DefaultPlugin.PATHING;
     }
     
     @Override
-    public List<List<EntryStack>> getRequiredEntries() {
+    public @NotNull List<List<EntryStack>> getRequiredEntries() {
         return getInputEntries();
     }
 }

RoughlyEnoughItems-default-plugin/src/main/java/me/shedaniel/rei/plugin/smelting/DefaultSmeltingDisplay.java

@@ -29,6 +29,7 @@ import net.fabricmc.api.EnvType;
 import net.fabricmc.api.Environment;
 import net.minecraft.resources.ResourceLocation;
 import net.minecraft.world.item.crafting.SmeltingRecipe;
+import org.jetbrains.annotations.NotNull;
 
 @Environment(EnvType.CLIENT)
 public class DefaultSmeltingDisplay extends DefaultCookingDisplay {
@@ -38,7 +39,7 @@ public class DefaultSmeltingDisplay extends DefaultCookingDisplay {
     }
     
     @Override
-    public ResourceLocation getRecipeCategory() {
+    public @NotNull ResourceLocation getRecipeCategory() {
         return DefaultPlugin.SMELTING;
     }
 }

RoughlyEnoughItems-default-plugin/src/main/java/me/shedaniel/rei/plugin/smithing/DefaultSmithingCategory.java

@@ -34,27 +34,28 @@ import me.shedaniel.rei.plugin.DefaultPlugin;
 import net.minecraft.client.resources.language.I18n;
 import net.minecraft.resources.ResourceLocation;
 import net.minecraft.world.level.block.Blocks;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.List;
 
 public class DefaultSmithingCategory implements RecipeCategory<DefaultSmithingDisplay> {
     @Override
-    public ResourceLocation getIdentifier() {
+    public @NotNull ResourceLocation getIdentifier() {
         return DefaultPlugin.SMITHING;
     }
     
     @Override
-    public String getCategoryName() {
+    public @NotNull String getCategoryName() {
         return I18n.get("category.rei.smithing");
     }
     
     @Override
-    public EntryStack getLogo() {
+    public @NotNull EntryStack getLogo() {
         return EntryStack.create(Blocks.SMITHING_TABLE);
     }
     
     @Override
-    public List<Widget> setupDisplay(DefaultSmithingDisplay display, Rectangle bounds) {
+    public @NotNull List<Widget> setupDisplay(DefaultSmithingDisplay display, Rectangle bounds) {
         Point startPoint = new Point(bounds.getCenterX() - 31, bounds.getCenterY() - 13);
         List<Widget> widgets = Lists.newArrayList();
         widgets.add(Widgets.createRecipeBase(bounds));

RoughlyEnoughItems-default-plugin/src/main/java/me/shedaniel/rei/plugin/smithing/DefaultSmithingDisplay.java

@@ -66,27 +66,27 @@ public class DefaultSmithingDisplay implements RecipeDisplay {
     }
     
     @Override
-    public List<List<EntryStack>> getInputEntries() {
+    public @NotNull List<List<EntryStack>> getInputEntries() {
         return input;
     }
     
     @Override
-    public List<List<EntryStack>> getResultingEntries() {
+    public @NotNull List<List<EntryStack>> getResultingEntries() {
         return Collections.singletonList(output);
     }
     
     @Override
-    public List<List<EntryStack>> getRequiredEntries() {
+    public @NotNull List<List<EntryStack>> getRequiredEntries() {
         return getInputEntries();
     }
     
     @Override
-    public ResourceLocation getRecipeCategory() {
+    public @NotNull ResourceLocation getRecipeCategory() {
         return DefaultPlugin.SMITHING;
     }
     
     @Override
-    public Optional<ResourceLocation> getRecipeLocation() {
+    public @NotNull Optional<ResourceLocation> getRecipeLocation() {
         return Optional.ofNullable(location);
     }
 }

RoughlyEnoughItems-default-plugin/src/main/java/me/shedaniel/rei/plugin/smoking/DefaultSmokingDisplay.java

@@ -27,6 +27,7 @@ import me.shedaniel.rei.plugin.DefaultPlugin;
 import me.shedaniel.rei.plugin.cooking.DefaultCookingDisplay;
 import net.minecraft.resources.ResourceLocation;
 import net.minecraft.world.item.crafting.SmokingRecipe;
+import org.jetbrains.annotations.NotNull;
 
 public class DefaultSmokingDisplay extends DefaultCookingDisplay {
     
@@ -35,7 +36,7 @@ public class DefaultSmokingDisplay extends DefaultCookingDisplay {
     }
     
     @Override
-    public ResourceLocation getRecipeCategory() {
+    public @NotNull ResourceLocation getRecipeCategory() {
         return DefaultPlugin.SMOKING;
     }
 }

RoughlyEnoughItems-default-plugin/src/main/java/me/shedaniel/rei/plugin/stonecutting/DefaultStoneCuttingCategory.java

@@ -34,28 +34,29 @@ import me.shedaniel.rei.plugin.DefaultPlugin;
 import net.minecraft.client.resources.language.I18n;
 import net.minecraft.resources.ResourceLocation;
 import net.minecraft.world.level.block.Blocks;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.List;
 
 public class DefaultStoneCuttingCategory implements RecipeCategory<DefaultStoneCuttingDisplay> {
     
     @Override
-    public ResourceLocation getIdentifier() {
+    public @NotNull ResourceLocation getIdentifier() {
         return DefaultPlugin.STONE_CUTTING;
     }
     
     @Override
-    public EntryStack getLogo() {
+    public @NotNull EntryStack getLogo() {
         return EntryStack.create(Blocks.STONECUTTER);
     }
     
     @Override
-    public String getCategoryName() {
+    public @NotNull String getCategoryName() {
         return I18n.get("category.rei.stone_cutting");
     }
     
     @Override
-    public List<Widget> setupDisplay(DefaultStoneCuttingDisplay display, Rectangle bounds) {
+    public @NotNull List<Widget> setupDisplay(DefaultStoneCuttingDisplay display, Rectangle bounds) {
         Point startPoint = new Point(bounds.getCenterX() - 41, bounds.getCenterY() - 13);
         List<Widget> widgets = Lists.newArrayList();
         widgets.add(Widgets.createRecipeBase(bounds));

RoughlyEnoughItems-default-plugin/src/main/java/me/shedaniel/rei/plugin/stonecutting/DefaultStoneCuttingDisplay.java

@@ -34,6 +34,7 @@ import net.minecraft.world.item.ItemStack;
 import net.minecraft.world.item.crafting.Ingredient;
 import net.minecraft.world.item.crafting.SingleItemRecipe;
 import net.minecraft.world.item.crafting.StonecutterRecipe;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.Collections;
 import java.util.List;
@@ -57,27 +58,27 @@ public class DefaultStoneCuttingDisplay implements RecipeDisplay {
     }
     
     @Override
-    public Optional<ResourceLocation> getRecipeLocation() {
+    public @NotNull Optional<ResourceLocation> getRecipeLocation() {
         return Optional.ofNullable(display).map(SingleItemRecipe::getId);
     }
     
     @Override
-    public List<List<EntryStack>> getInputEntries() {
+    public @NotNull List<List<EntryStack>> getInputEntries() {
         return inputs;
     }
     
     @Override
-    public List<List<EntryStack>> getResultingEntries() {
+    public @NotNull List<List<EntryStack>> getResultingEntries() {
         return Collections.singletonList(output);
     }
     
     @Override
-    public ResourceLocation getRecipeCategory() {
+    public @NotNull ResourceLocation getRecipeCategory() {
         return DefaultPlugin.STONE_CUTTING;
     }
     
     @Override
-    public List<List<EntryStack>> getRequiredEntries() {
+    public @NotNull List<List<EntryStack>> getRequiredEntries() {
         return getInputEntries();
     }
 }

RoughlyEnoughItems-default-plugin/src/main/java/me/shedaniel/rei/plugin/stripping/DefaultStrippingCategory.java

@@ -34,28 +34,29 @@ import me.shedaniel.rei.plugin.DefaultPlugin;
 import net.minecraft.client.resources.language.I18n;
 import net.minecraft.resources.ResourceLocation;
 import net.minecraft.world.item.Items;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.List;
 
 public class DefaultStrippingCategory implements RecipeCategory<DefaultStrippingDisplay> {
     
     @Override
-    public ResourceLocation getIdentifier() {
+    public @NotNull ResourceLocation getIdentifier() {
         return DefaultPlugin.STRIPPING;
     }
     
     @Override
-    public EntryStack getLogo() {
+    public @NotNull EntryStack getLogo() {
         return EntryStack.create(Items.IRON_AXE);
     }
     
     @Override
-    public String getCategoryName() {
+    public @NotNull String getCategoryName() {
         return I18n.get("category.rei.stripping");
     }
     
     @Override
-    public List<Widget> setupDisplay(DefaultStrippingDisplay recipeDisplay, Rectangle bounds) {
+    public @NotNull List<Widget> setupDisplay(DefaultStrippingDisplay recipeDisplay, Rectangle bounds) {
         Point startPoint = new Point(bounds.getCenterX() - 41, bounds.getCenterY() - 13);
         List<Widget> widgets = Lists.newArrayList();
         widgets.add(Widgets.createRecipeBase(bounds));

RoughlyEnoughItems-default-plugin/src/main/java/me/shedaniel/rei/plugin/stripping/DefaultStrippingDisplay.java

@@ -30,6 +30,7 @@ import net.fabricmc.api.EnvType;
 import net.fabricmc.api.Environment;
 import net.minecraft.resources.ResourceLocation;
 import net.minecraft.world.item.ItemStack;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.Collections;
 import java.util.List;
@@ -57,22 +58,22 @@ public class DefaultStrippingDisplay implements RecipeDisplay {
     }
     
     @Override
-    public List<List<EntryStack>> getInputEntries() {
+    public @NotNull List<List<EntryStack>> getInputEntries() {
         return Collections.singletonList(Collections.singletonList(in));
     }
     
     @Override
-    public List<List<EntryStack>> getResultingEntries() {
+    public @NotNull List<List<EntryStack>> getResultingEntries() {
         return Collections.singletonList(Collections.singletonList(out));
     }
     
     @Override
-    public ResourceLocation getRecipeCategory() {
+    public @NotNull ResourceLocation getRecipeCategory() {
         return DefaultPlugin.STRIPPING;
     }
     
     @Override
-    public List<List<EntryStack>> getRequiredEntries() {
+    public @NotNull List<List<EntryStack>> getRequiredEntries() {
         return getInputEntries();
     }
 }

RoughlyEnoughItems-default-plugin/src/main/java/me/shedaniel/rei/plugin/tilling/DefaultTillingCategory.java

@@ -34,28 +34,29 @@ import me.shedaniel.rei.plugin.DefaultPlugin;
 import net.minecraft.client.resources.language.I18n;
 import net.minecraft.resources.ResourceLocation;
 import net.minecraft.world.item.Items;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.List;
 
 public class DefaultTillingCategory implements RecipeCategory<DefaultTillingDisplay> {
     
     @Override
-    public ResourceLocation getIdentifier() {
+    public @NotNull ResourceLocation getIdentifier() {
         return DefaultPlugin.TILLING;
     }
     
     @Override
-    public EntryStack getLogo() {
+    public @NotNull EntryStack getLogo() {
         return EntryStack.create(Items.IRON_HOE);
     }
     
     @Override
-    public String getCategoryName() {
+    public @NotNull String getCategoryName() {
         return I18n.get("category.rei.tilling");
     }
     
     @Override
-    public List<Widget> setupDisplay(DefaultTillingDisplay recipeDisplay, Rectangle bounds) {
+    public @NotNull List<Widget> setupDisplay(DefaultTillingDisplay recipeDisplay, Rectangle bounds) {
         Point startPoint = new Point(bounds.getCenterX() - 41, bounds.getCenterY() - 13);
         List<Widget> widgets = Lists.newArrayList();
         widgets.add(Widgets.createRecipeBase(bounds));

RoughlyEnoughItems-default-plugin/src/main/java/me/shedaniel/rei/plugin/tilling/DefaultTillingDisplay.java

@@ -30,6 +30,7 @@ import net.fabricmc.api.EnvType;
 import net.fabricmc.api.Environment;
 import net.minecraft.resources.ResourceLocation;
 import net.minecraft.world.item.ItemStack;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.Collections;
 import java.util.List;
@@ -57,22 +58,22 @@ public class DefaultTillingDisplay implements RecipeDisplay {
     }
     
     @Override
-    public List<List<EntryStack>> getInputEntries() {
+    public @NotNull List<List<EntryStack>> getInputEntries() {
         return Collections.singletonList(Collections.singletonList(in));
     }
     
     @Override
-    public List<List<EntryStack>> getResultingEntries() {
+    public @NotNull List<List<EntryStack>> getResultingEntries() {
         return Collections.singletonList(Collections.singletonList(out));
     }
     
     @Override
-    public ResourceLocation getRecipeCategory() {
+    public @NotNull ResourceLocation getRecipeCategory() {
         return DefaultPlugin.TILLING;
     }
     
     @Override
-    public List<List<EntryStack>> getRequiredEntries() {
+    public @NotNull List<List<EntryStack>> getRequiredEntries() {
         return getInputEntries();
     }
 }

RoughlyEnoughItems-runtime/src/main/java/me/shedaniel/rei/impl/ScreenHelper.java

@@ -57,6 +57,7 @@ import net.minecraft.world.InteractionResult;
 import net.minecraft.world.item.ItemStack;
 import org.apache.logging.log4j.util.TriConsumer;
 import org.jetbrains.annotations.ApiStatus;
+import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
 import java.util.LinkedHashSet;
@@ -95,15 +96,17 @@ public class ScreenHelper implements ClientModInitializer, REIHelper {
     }
     
     @Override
+    @Nullable
     public TextFieldWidget getSearchTextField() {
         return searchField;
     }
     
     @Override
-    public List<ItemStack> getInventoryStacks() {
+    public @NotNull List<ItemStack> getInventoryStacks() {
         return inventoryStacks;
     }
     
+    @Nullable
     public static OverlaySearchField getSearchField() {
         return (OverlaySearchField) getInstance().getSearchTextField();
     }
@@ -215,7 +218,7 @@ public class ScreenHelper implements ClientModInitializer, REIHelper {
     }
     
     @Override
-    public ResourceLocation getDefaultDisplayTexture() {
+    public @NotNull ResourceLocation getDefaultDisplayTexture() {
         return isDarkThemeEnabled() ? DISPLAY_TEXTURE_DARK : DISPLAY_TEXTURE;
     }