def presence
import bendvy-ecs-core@0.1.0.3/column.bend as Columnimport Base
474def presence(~S: Data, ~C: Type, result: Column<S,C> & Maybe<&2,Bool>) -> Column<S,C> & Bool:
475 match result:
476 case (column, None{}):
477 (column, False{})
478 case (column, Some{found}):
479 (column, found)