Map.seek: def of Base
Import: import Base
Lines 2840-2848 of Base/base.bend: https://jend.leeeet.dev/read.txt?path=Base/base.bend&start_line=2840&end_line=2848

import Base

def Map.seek(-a: Quant, -V: Kind(a), m: Map<a, V>, key: String) ->
  Map<a, V> & String & Maybe<&2, String>:
  match m:
    case MTip{}:
      (MTip{}, key, None{})
    case MLeaf{+k, v}:
      (MLeaf{k, v}, key, Some{k})
    case MNode{+pos, lo, hi}:
      Map.seek.go(a, V, MNode{pos, lo, hi}, Map.bit(key, pos))

Uses (7):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Map
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Map.bit
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Map.seek.go
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Maybe
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Pair
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Sigma
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=String