"description": "Defines the block that will be placed.", "description": "If true, the item will be registered as the item for this block. This item will be returned ...
@ModifyArg(method = "tryPlacingChildren(Lnet/minecraft/world/level/levelgen/structure/PoolElementStructurePiece;Lorg/apache/commons/lang3/mutable/MutableObject;IZLnet ...