RelationGraph.key_erased: def of bendvy-ecs-core@0.1.0.3
Import: import bendvy-ecs-core@0.1.0.3/relation_graph.bend as RelationGraph
Lines 5-8 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=5&end_line=8

import Base
import relation_types.bend as T

# Experimental maintained inverse implementation. Does not call graph-spec.
def key_erased(-S: Data,descriptor: T.Descriptor<S>) -> U32:
  match descriptor:
    case T.Descriptor{key,_,_,_}: key

Uses (2):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32
  https://jend.leeeet.dev/definition.txt?path=bendvy-ecs-core@0.1.0.3/relation_types.bend&name=Descriptor