CLASS net/minecraft/class_6871 net/minecraft/world/gen/chunk/placement/ConcentricRingsStructurePlacement
	FIELD field_36419 CODEC Lcom/mojang/serialization/Codec;
	METHOD method_40167 (Lcom/mojang/serialization/codecs/RecordCodecBuilder$Instance;)Lcom/mojang/datafixers/kinds/App;
		ARG 0 instance