def take_left_done
import bendvy-ecs-core@0.1.0.3/chunk_column.bend as ChunkColumnimport Base
231def take_left_done(-S:Data,-C:Type,half:U32,right:Column<S,C>,result:Column<S,C> & Maybe<&1,C>) -> Column<S,C> & Maybe<&1,C>:
232 match result:
233 case (left,previous):(Branch{half,left,right},previous)