CLASS fl net/minecraft/util/registry/RegistryWritable
	METHOD a set (ILpu;Ljava/lang/Object;)Ljava/lang/Object;
		ARG 1 rawId
		ARG 2 id
		ARG 3 value
	METHOD a register (Lpu;Ljava/lang/Object;)Ljava/lang/Object;
		ARG 1 id
		ARG 2 value
	METHOD c isEmpty ()Z