def stamp_leaf
import bendvy-ecs-core@0.1.0.3/chunk_column.bend as ChunkColumnimport Base
import bendvy-ecs-core@0.1.0.3/lifecycle.bend as L
192def stamp_leaf(~S:Data,~C:Type,values:Array<Maybe<&1,C>>,stamps:Array<L.Stamp>,+index:U32,valid:Bool) -> Column<S,C> & Maybe<&2,L.Stamp>:
193 match valid:
194 case False{}: (Leaf{values,stamps},None{})
195 case True{}: stamp_got(~S,~C,values,Array.get(L.Stamp,stamps,index))