CLASS btd net/minecraft/world/level/storage/AlphaChunkIo
	CLASS btd$a AlphaChunk
	METHOD a convertAlphaChunk (Lbtd$a;Lhr;Lbdq;)V
		ARG 0 alphaChunk
		ARG 1 tag
		ARG 2 biomeSource
	METHOD a readAlphaChunk (Lhr;)Lbtd$a;
		ARG 0 tag