def relation_viewed
bendvy-ecs-core@0.1.0.4 · ordinary_app_resource_field_declaration.bend:121
import bendvy-ecs-core@0.1.0.4/ordinary_app_resource_field_declaration.bend as OrdinaryAppResourceFieldDeclaration
import Base
import bendvy-ecs-core@0.1.0.4/ordinary_app_relation.bend as Relation
import bendvy-ecs-core@0.1.0.4/ordinary_app_observation_data.bend as DTO
121def relation_viewed(~S:Data,~C:Type,~R:Type,~E:Data,result:Relation.World(~S,~C,~R,~E) & DTO.Observation<Relation.View<S>>) -> Relation.World(~S,~C,~R,~E) & Relation.View<S>:
122 match result:
123 case (world,DTO.Observation{view,_}):(world,view)