Registries

In Minecraft’s startup, most important data relating to the game, such as blocks, items, entities, etc, are all registered into Registries. These allow for content to be added to the game within a central area. However, issues do occur on a technical basis when dealing with registries and when to register content. Because of this with Draco, you are presented with two options for registring content

DeferredRegistry	BuiltInRegistries
This is the official method provided by Draco that allows you to defer registring content before the IRegisterListener event, it requires register to be done manually once the listener is called, however, it allows for initialization of content before the registry is available for registering content	This method is usually much simpler to interface with and is the vanilla way of doing things, It can from a programmer standpoint make more sense, but comes with the caveat of having issues if initialized before the IRegisterListener listener is called.

For the sake of simplicity we will be using DeferredRegistry as this is the simpliest and the officially supported method of registering content with Draco.