Working on Spatial Stuff.

src/main/java/appeng/hooks/DynamicDimensions.java

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+package appeng.hooks;
+
+import net.minecraft.server.world.ServerWorld;
+import net.minecraft.util.registry.RegistryKey;
+import net.minecraft.world.World;
+import net.minecraft.world.dimension.DimensionType;
+import net.minecraft.world.gen.chunk.ChunkGenerator;
+
+public interface DynamicDimensions {
+
+    ServerWorld addWorld(RegistryKey<World> worldId, RegistryKey<DimensionType> dimensionTypeId, ChunkGenerator chunkGenerator);
+
+}

src/main/java/appeng/hooks/RegisterDimensionTypeCallback.java

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+package appeng.hooks;
+
+import net.fabricmc.fabric.api.event.Event;
+import net.fabricmc.fabric.api.event.EventFactory;
+import net.minecraft.util.registry.RegistryTracker;
+
+public interface RegisterDimensionTypeCallback {
+
+    Event<RegisterDimensionTypeCallback> EVENT = EventFactory.createArrayBacked(RegisterDimensionTypeCallback.class, (listeners) -> (registryTracker) -> {
+        for (RegisterDimensionTypeCallback listener : listeners) {
+            listener.addDimensionTypes(registryTracker);
+        }
+    });
+
+    void addDimensionTypes(RegistryTracker.Modifiable registryTracker);
+
+}