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