Package net.fabricmc.fabric.api.event.registry

Interface DynamicRegistrySetupCallback

Functional Interface:
This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.
@FunctionalInterface public interface DynamicRegistrySetupCallback
This event gets triggered when a new DynamicRegistryManager gets created, but before it gets filled. Therefore, this is the ideal place to register callbacks to dynamic registries. For example, the following code is used to register a callback that gets triggered for any registered Biome, both JSON and code defined. 
 
 DynamicRegistrySetupCallback.EVENT.register(registryManager -> {
     Registry<Biome> biomes = registryManager.get(Registry.BIOME_KEY);
     RegistryEntryAddedCallback.event(biomes).register((rawId, id, object) -> {
         // Do something
     });
 });