add mixin to inject flora

platforms/mixin-lifecycle/src/main/java/com/dfsek/terra/lifecycle/mixin/lifecycle/RegistryLoaderMixin.java

@@ -17,6 +17,7 @@ import net.minecraft.world.gen.chunk.ChunkGeneratorSettings;
 import org.checkerframework.checker.units.qual.C;
 import org.spongepowered.asm.mixin.Mixin;
 import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
 import org.spongepowered.asm.mixin.injection.Redirect;
 
 import java.util.List;
@@ -28,7 +29,6 @@ import com.dfsek.terra.lifecycle.util.LifecycleUtil;
 
 @Mixin(RegistryLoader.class)
 public class RegistryLoaderMixin {
-    @SuppressWarnings("unchecked")
     @Redirect(
             method = "load(Lnet/minecraft/resource/ResourceManager;Lnet/minecraft/registry/DynamicRegistryManager;Ljava/util/List;)" +
                      "Lnet/minecraft/registry/DynamicRegistryManager$Immutable;",

platforms/mixin-lifecycle/src/main/java/com/dfsek/terra/lifecycle/mixin/lifecycle/SaveLoadingMixin.java

@@ -0,0 +1,32 @@
+package com.dfsek.terra.lifecycle.mixin.lifecycle;
+
+import com.dfsek.terra.lifecycle.util.LifecycleUtil;
+
+import com.dfsek.terra.mod.util.MinecraftUtil;
+
+import net.minecraft.registry.DynamicRegistryManager;
+import net.minecraft.registry.RegistryKeys;
+import net.minecraft.server.SaveLoading;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.ModifyArg;
+
+
+@Mixin(SaveLoading.class)
+public class SaveLoadingMixin {
+    @ModifyArg(
+            method = "method_42097(Lnet/minecraft/registry/DynamicRegistryManager$Immutable;" +
+                     "Lnet/minecraft/server/SaveLoading$SaveApplierFactory;Lnet/minecraft/resource/LifecycledResourceManager;" +
+                     "Lnet/minecraft/registry/CombinedDynamicRegistries;Lnet/minecraft/server/SaveLoading$LoadContext;" +
+                     "Lnet/minecraft/server/DataPackContents;)Ljava/lang/Object;",
+            at = @At(
+                    value = "INVOKE",
+                    target = "Lnet/minecraft/server/DataPackContents;refresh(Lnet/minecraft/registry/DynamicRegistryManager;)V"
+            ),
+            index = 0
+    )
+    private static DynamicRegistryManager grabManager(DynamicRegistryManager in) {
+        MinecraftUtil.registerFlora(in.get(RegistryKeys.BIOME));
+        return in;
+    }
+}

platforms/mixin-lifecycle/src/main/resources/terra.lifecycle.mixins.json

@@ -9,7 +9,8 @@
     "RegistryMixin",
     "SimpleRegistryMixin",
     "lifecycle.MinecraftServerMixin",
-        "lifecycle.RegistryLoaderMixin"
+    "lifecycle.RegistryLoaderMixin",
+    "lifecycle.SaveLoadingMixin"
   ],
   "client": [
   ],