Nar.tree: def of ezx@1.11.0.0
Import: import ezx@1.11.0.0/src/sha/nar.bend as Nar
Lines 450-456 of ezx@1.11.0.0/src/sha/nar.bend: https://jend.leeeet.dev/read.txt?path=ezx@1.11.0.0/src/sha/nar.bend&start_line=450&end_line=456

import Base

# the node of the whole tree, or none for an empty listing
def tree(es: List<&2, Ent>) -> Maybe<&2, String>:
  match es:
    case []:
      None{}
    case Ent{+kind, ex, name, at, body} <> t:
      tree.top(String.eq(kind, "d"), Ent{kind, ex, name, at, body}, t)

Uses (6):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Maybe
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=String
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=String.eq
  https://jend.leeeet.dev/definition.txt?path=ezx@1.11.0.0/src/sha/nar.bend&name=Ent
  https://jend.leeeet.dev/definition.txt?path=ezx@1.11.0.0/src/sha/nar.bend&name=tree.top