CLASS net/minecraft/class_2861 net/minecraft/world/storage/RegionFile
	CLASS class_2862 ChunkBuffer
		FIELD field_17656 pos Lnet/minecraft/class_1923;
	METHOD method_12419 getOffset (Lnet/minecraft/class_1923;)I
		ARG 1 pos
	METHOD method_12423 hasChunk (Lnet/minecraft/class_1923;)Z
		ARG 1 pos
	METHOD method_17909 getPackedRegionRelativePosition (Lnet/minecraft/class_1923;)I