fix structure location

platforms/fabric/src/main/java/com/dfsek/terra/fabric/generation/TerraBiomeSource.java

@@ -44,7 +44,7 @@ public class TerraBiomeSource extends BiomeSource {
                       .stream(pack.getBiomeProvider()
                                   .getBiomes()
                                   .spliterator(), false)
-                      .map(b -> ((ProtoPlatformBiome) b.getPlatformBiome()).get(biomes)));
+                      .map(b -> ((ProtoPlatformBiome) b.getPlatformBiome()).getDelegate()));
         this.biomeRegistry = biomes;
         this.seed = seed;
         this.pack = pack;

platforms/fabric/src/main/java/com/dfsek/terra/fabric/mixin/Test.java

@@ -0,0 +1,36 @@
+package com.dfsek.terra.fabric.mixin;
+
+import com.dfsek.terra.api.world.biome.Biome;
+
+import net.minecraft.entity.SpawnGroup;
+import net.minecraft.util.registry.RegistryEntryList;
+import net.minecraft.world.StructureSpawns;
+import net.minecraft.world.gen.chunk.ChunkGenerator;
+import net.minecraft.world.gen.feature.FeatureConfig;
+import net.minecraft.world.gen.feature.StructureFeature;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Redirect;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
+
+import java.util.Collection;
+import java.util.Collections;
+import java.util.Map;
+import java.util.Set;
+
+
+@Mixin(ChunkGenerator.class)
+public class Test<FC extends FeatureConfig, F extends StructureFeature<FC>> {
+    
+    @Redirect(method = "Lnet/minecraft/world/gen/chunk/ChunkGenerator;locateStructure(Lnet/minecraft/server/world/ServerWorld;Lnet/minecraft/util/registry/RegistryEntryList;Lnet/minecraft/util/math/BlockPos;IZ)Lcom/mojang/datafixers/util/Pair;", at = @At(value = "INVOKE", target = "Ljava/util/Set;isEmpty()Z"))
+    private boolean inject(Set<?> instance) {
+        System.out.println("Biome Set: " + instance);
+        return instance.isEmpty();
+    }
+    
+    @Redirect(method = "Lnet/minecraft/world/gen/chunk/ChunkGenerator;locateStructure(Lnet/minecraft/server/world/ServerWorld;Lnet/minecraft/util/registry/RegistryEntryList;Lnet/minecraft/util/math/BlockPos;IZ)Lcom/mojang/datafixers/util/Pair;", at = @At(value = "INVOKE", target = "Ljava/util/Collections;disjoint(Ljava/util/Collection;Ljava/util/Collection;)Z"))
+    private boolean inject2(Collection<?> c, Collection<?> c2) {
+        System.out.println("Biome Source Set: " + c);
+        return Collections.disjoint(c, c2);
+    }
+}

platforms/fabric/src/main/java/com/dfsek/terra/fabric/util/ProtoPlatformBiome.java

@@ -46,7 +46,7 @@ public class ProtoPlatformBiome implements PlatformBiome {
     }
     
     public RegistryEntry<Biome> getDelegate() {
-        return Objects.requireNonNull(delegate);
+        return delegate;
     }
     
     public void setDelegate(RegistryEntry<Biome> delegate) {

platforms/fabric/src/main/resources/terra.mixins.json

@@ -4,6 +4,7 @@
   "package": "com.dfsek.terra.fabric.mixin",
   "compatibilityLevel": "JAVA_16",
   "mixins": [
+    "Test",
     "access.BiomeEffectsAccessor",
     "access.MobSpawnerLogicAccessor",
     "access.StateAccessor",
@@ -32,9 +33,9 @@
     "implementations.inventory.meta.ItemStackMetaMixin",
     "implementations.world.ChunkRegionMixin",
     "implementations.world.ServerWorldMixin",
-    "lifecycle.RegistryMixin",
     "lifecycle.DataPackContentsMixin",
-    "lifecycle.MinecraftServerMixin"
+    "lifecycle.MinecraftServerMixin",
+    "lifecycle.RegistryMixin"
   ],
   "client": [
     "access.GeneratorTypeAccessor",