CLASS fs net/minecraft/util/registry/MutableRegistry
	METHOD a set (ILqt;Ljava/lang/Object;)Ljava/lang/Object;
		ARG 1 rawId
		ARG 2 id
		ARG 3 entry
	METHOD a add (Lqt;Ljava/lang/Object;)Ljava/lang/Object;
		ARG 1 id
		ARG 2 entry
	METHOD c isEmpty ()Z
