CLASS net/minecraft/class_6872 net/minecraft/world/gen/chunk/placement/RandomSpreadStructurePlacement FIELD field_36420 CODEC Lcom/mojang/serialization/Codec; METHOD (IILnet/minecraft/class_6873;I)V ARG 1 spacing ARG 3 spreadType METHOD method_40169 getStartChunk (JII)Lnet/minecraft/class_1923; ARG 1 seed ARG 3 x ARG 4 z METHOD method_40170 (Lcom/mojang/serialization/codecs/RecordCodecBuilder$Instance;)Lcom/mojang/datafixers/kinds/App; ARG 0 instance METHOD method_40171 (Lnet/minecraft/class_6872;)Lcom/mojang/serialization/DataResult; ARG 0 placement