remove NONE fan processing

src/main/java/com/simibubi/create/content/kinetics/belt/transport/TransportedItemStack.java

@@ -81,8 +81,10 @@ public class TransportedItemStack implements Comparable<TransportedItemStack> {
 		nbt.putInt("Angle", angle);
 		nbt.putInt("InDirection", insertedFrom.get3DDataValue());
 
-		if (processedBy != null && processedBy != AllFanProcessingTypes.NONE) {
+		if (processedBy != null) {
 			ResourceLocation key = CreateBuiltInRegistries.FAN_PROCESSING_TYPE.getKey(processedBy);
+			if (key == null)
+				throw new IllegalArgumentException("Could not get id for FanProcessingType " + processedBy + "!");
 
 			nbt.putString("FanProcessingType", key.toString());
 			nbt.putInt("FanProcessingTime", processingTime);

src/main/java/com/simibubi/create/content/kinetics/fan/AirCurrent.java

@@ -5,12 +5,12 @@ import java.util.Iterator;
 import java.util.List;
 
 import org.apache.commons.lang3.tuple.Pair;
+import org.jetbrains.annotations.Nullable;
 
 import com.simibubi.create.AllTags;
 import com.simibubi.create.content.decoration.copycat.CopycatBlock;
 import com.simibubi.create.content.kinetics.belt.behaviour.TransportedItemStackHandlerBehaviour;
 import com.simibubi.create.content.kinetics.belt.behaviour.TransportedItemStackHandlerBehaviour.TransportedResult;
-import com.simibubi.create.content.kinetics.fan.processing.AllFanProcessingTypes;
 import com.simibubi.create.content.kinetics.fan.processing.FanProcessing;
 import com.simibubi.create.content.kinetics.fan.processing.FanProcessingType;
 import com.simibubi.create.foundation.advancement.AllAdvancements;
@@ -108,7 +108,7 @@ public class AirCurrent {
 
 			FanProcessingType processingType = getTypeAt((float) entityDistance);
 
-			if (processingType == AllFanProcessingTypes.NONE)
+			if (processingType == null)
 				continue;
 
 			if (entity instanceof ItemEntity itemEntity) {
@@ -140,7 +140,7 @@ public class AirCurrent {
 			TransportedItemStackHandlerBehaviour handler = pair.getKey();
 			Level world = handler.getWorld();
 			FanProcessingType processingType = pair.getRight();
-			if (processingType == AllFanProcessingTypes.NONE)
+			if (processingType == null)
 				continue;
 
 			handler.handleProcessingOnAllItems(transported -> {
@@ -178,7 +178,7 @@ public class AirCurrent {
 		// Determine segments with transported fluids/gases
 		segments.clear();
 		AirCurrentSegment currentSegment = null;
-		FanProcessingType type = AllFanProcessingTypes.NONE;
+		FanProcessingType type = null;
 
 		int limit = getLimit();
 		int searchStart = pushing ? 1 : limit;
@@ -189,7 +189,7 @@ public class AirCurrent {
 		for (int i = searchStart; i * searchStep <= searchEnd * searchStep; i += searchStep) {
 			BlockPos currentPos = start.relative(direction, i);
 			FanProcessingType newType = FanProcessingType.getAt(world, currentPos);
-			if (newType != AllFanProcessingTypes.NONE) {
+			if (newType != null) {
 				type = newType;
 			}
 			if (currentSegment == null) {
@@ -322,7 +322,7 @@ public class AirCurrent {
 					BlockEntityBehaviour.get(world, pos, TransportedItemStackHandlerBehaviour.TYPE);
 				if (behaviour != null) {
 					FanProcessingType type = FanProcessingType.getAt(world, pos);
-					if (type == AllFanProcessingTypes.NONE)
+					if (type == null)
 						type = segmentType;
 					affectedItemHandlers.add(Pair.of(behaviour, type));
 				}
@@ -339,6 +339,7 @@ public class AirCurrent {
 			.getEntities(null, bounds);
 	}
 
+	@Nullable
 	public FanProcessingType getTypeAt(float offset) {
 		if (offset >= 0 && offset <= maxDistance) {
 			if (pushing) {
@@ -355,10 +356,11 @@ public class AirCurrent {
 				}
 			}
 		}
-		return AllFanProcessingTypes.NONE;
+		return null;
 	}
 
 	private static class AirCurrentSegment {
+		@Nullable
 		private FanProcessingType type;
 		private int startOffset;
 		private int endOffset;

src/main/java/com/simibubi/create/content/kinetics/fan/AirFlowParticle.java

@@ -1,8 +1,8 @@
 package com.simibubi.create.content.kinetics.fan;
 
 import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
 
-import com.simibubi.create.content.kinetics.fan.processing.AllFanProcessingTypes;
 import com.simibubi.create.content.kinetics.fan.processing.FanProcessingType;
 
 import net.createmod.catnip.math.VecHelper;
@@ -78,7 +78,7 @@ public class AirFlowParticle extends SimpleAnimatedParticle {
 			motion = motion.scale(airCurrent.maxDistance - (distance - 1f)).scale(.5f);
 
 			FanProcessingType type = getType(distance);
-			if (type == AllFanProcessingTypes.NONE) {
+			if (type == null) {
 				setColor(0xEEEEEE);
 				setAlpha(.25f);
 				selectSprite((int) Mth.clamp((distance / airCurrent.maxDistance) * 8 + random.nextInt(4),
@@ -100,9 +100,10 @@ public class AirFlowParticle extends SimpleAnimatedParticle {
 		}
 	}
 
+	@Nullable
 	private FanProcessingType getType(double distance) {
 		if (source.getAirCurrent() == null)
-			return AllFanProcessingTypes.NONE;
+			return null;
 		return source.getAirCurrent().getTypeAt((float) distance);
 	}
 

src/main/java/com/simibubi/create/content/kinetics/fan/processing/AllFanProcessingTypes.java

@@ -62,7 +62,6 @@ import net.minecraftforge.registries.DeferredRegister;
 public class AllFanProcessingTypes {
 	private static final DeferredRegister<FanProcessingType> REGISTER = DeferredRegister.create(CreateRegistries.FAN_PROCESSING_TYPE, Create.ID);
 
-	public static final NoneType NONE = register("none", new NoneType());
 	public static final BlastingType BLASTING = register("blasting", new BlastingType());
 	public static final HauntingType HAUNTING = register("haunting", new HauntingType());
 	public static final SmokingType SMOKING = register("smoking", new SmokingType());
@@ -72,7 +71,6 @@ public class AllFanProcessingTypes {
 
 	static {
 		Object2ReferenceOpenHashMap<String, FanProcessingType> map = new Object2ReferenceOpenHashMap<>();
-		map.put("NONE", NONE);
 		map.put("BLASTING", BLASTING);
 		map.put("HAUNTING", HAUNTING);
 		map.put("SMOKING", SMOKING);
@@ -95,6 +93,7 @@ public class AllFanProcessingTypes {
 		return LEGACY_NAME_MAP.get(name);
 	}
 
+	@Nullable
 	public static FanProcessingType parseLegacy(String str) {
 		FanProcessingType type = ofLegacyName(str);
 		if (type != null) {

src/main/java/com/simibubi/create/content/kinetics/fan/processing/FanProcessing.java

@@ -96,6 +96,8 @@ public class FanProcessing {
 
 		if (!processing.contains("Type") || AllFanProcessingTypes.parseLegacy(processing.getString("Type")) != type) {
 			ResourceLocation key = CreateBuiltInRegistries.FAN_PROCESSING_TYPE.getKey(type);
+			if (key == null)
+				throw new IllegalArgumentException("Could not get id for FanProcessingType " + type + "!");
 
 			processing.putString("Type", key.toString());
 			int timeModifierForStackSize = ((entity.getItem()

src/main/java/com/simibubi/create/content/kinetics/fan/processing/FanProcessingType.java

@@ -31,25 +31,19 @@ public interface FanProcessingType {
 
 	void affectEntity(Entity entity, Level level);
 
+	@Nullable
 	static FanProcessingType parse(String str) {
-		ResourceLocation id = ResourceLocation.tryParse(str);
+		return CreateBuiltInRegistries.FAN_PROCESSING_TYPE.get(ResourceLocation.tryParse(str));
-		if (id == null) {
-			return AllFanProcessingTypes.NONE;
-		}
-		FanProcessingType type = CreateBuiltInRegistries.FAN_PROCESSING_TYPE.get(id);
-		if (type == null) {
-			return AllFanProcessingTypes.NONE;
-		}
-		return type;
 	}
 
+	@Nullable
 	static FanProcessingType getAt(Level level, BlockPos pos) {
 		for (FanProcessingType type : FanProcessingTypeRegistry.getSortedTypesView()) {
 			if (type.isValidAt(level, pos)) {
 				return type;
 			}
 		}
-		return AllFanProcessingTypes.NONE;
+		return null;
 	}
 
 	interface AirFlowParticleAccess {