DeferredRegister#makeRegistry Implementation

I am currently in the process of updating the docs's current information to 1.16.x as of version 32.0.38. There are a few quick fixes I have done already. I want to edit the Creating Registries section to include the static initialization done by DeferredRegister. The way, if I'm not mistaken to implement a custom registry using DeferredRegister is by using:

public static final DeferredRegister<REGISTRY> REGISTRY_INSTANCE = DeferredRegister.create(REGISTRY.class, MODID);

We can also create the registry rather than using the event by calling DeferredRegister#makeRegistry. My guess at an implementation would be:

public ExampleMod() {
	REGISTRY_INSTANCE.makeRegistry("custom_registry", () -> new RegistryBuilder<>());
	REGISTRY_INSTANCE.register(FMLJavaModLoadingContext.get().getModEventBus());
}

DeferredRegister#makeRegistry returns a Supplier holding an IForgeRegistry. My question is what would the return value be used for and if this is the correct representation of the method. Thank you for your time.