def selected_join
import bendvy-ecs-core@0.1.0.4/compose.bend as Composeimport Base
import component.bend as Cmp
155def selected_join(~S: Data,~Store: Type,~R: Type,~E: Data,~V: Data,mode: Selection,observed: Frame<S,Store,R,E> & Cmp.Access<V>) -> Frame<S,Store,R,E> & Bool:
156 (frame,value) = observed
157 (frame,selected_value(~V,mode,value))