RelationGraph.contains: def of bendvy-ecs-core@0.1.0.3
Import: import bendvy-ecs-core@0.1.0.3/relation_graph.bend as RelationGraph
Lines 12-15 of bendvy-ecs-core@0.1.0.3/relation_graph.bend: https://jend.leeeet.dev/read.txt?path=bendvy-ecs-core@0.1.0.3/relation_graph.bend&start_line=12&end_line=15

import Base
import entity_key.bend as K

def contains(xs: List<&2,K.Key>,+id: K.Key) -> Bool:
  match xs:
    case []: False{}
    case x <> rest: Bool.or(K.equal(x,id),contains(rest,id))

Uses (5):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool.or
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List
  https://jend.leeeet.dev/definition.txt?path=bendvy-ecs-core@0.1.0.3/entity_key.bend&name=Key
  https://jend.leeeet.dev/definition.txt?path=bendvy-ecs-core@0.1.0.3/entity_key.bend&name=equal