CLASS net/minecraft/class_3520 net/minecraft/world/gen/surfacebuilder/NetherSurfaceBuilder
	FIELD field_15659 GRAVEL Lnet/minecraft/class_2680;
	FIELD field_15660 CAVE_AIR Lnet/minecraft/class_2680;
	FIELD field_15661 seed J
	FIELD field_15662 GLOWSTONE Lnet/minecraft/class_2680;
	FIELD field_15663 noise Lnet/minecraft/class_3537;
