Feature.names: def of bendvy-ecs-core@0.1.0.3
Import: import bendvy-ecs-core@0.1.0.3/feature.bend as Feature
Lines 35-41 of bendvy-ecs-core@0.1.0.3/feature.bend: https://jend.leeeet.dev/read.txt?path=bendvy-ecs-core@0.1.0.3/feature.bend&start_line=35&end_line=41

import Base

# List selected feature names in authored sequence order, without recursively
# treating dependency references as additional selected features.
def names(~S:Data,tree:Tree<S>) -> List<&2,String>:
  match tree:
    case Empty{}: []
    case Feature{name,_,_}: [name]
    case Sequence{left,right}: List.append(&2,String,names(~S,left),names(~S,right))

Uses (4):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List.append
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=String
  https://jend.leeeet.dev/definition.txt?path=bendvy-ecs-core@0.1.0.3/feature.bend&name=Tree