CLASS bbs net/minecraft/world/biome/source/BiomeSource
	FIELD a STRUCTURE_FEATURES Ljava/util/Map;
	FIELD b topMaterials Ljava/util/Set;
	FIELD c SPAWN_BIOMES Ljava/util/List;
	METHOD a getSpawnBiomes ()Ljava/util/List;
	METHOD a (IIILjava/util/List;Ljava/util/Random;)Let;
		ARG 4 biomes
	METHOD a hasStructureFeature (Lbxk;)Z
		ARG 1 feature
	METHOD b getTopMaterials ()Ljava/util/Set;