Core.must: def of yaml-for-bend@0.1.1.0
Import: import yaml-for-bend@0.1.1.0/core.bend as Core
Lines 112-117 of yaml-for-bend@0.1.1.0/core.bend: https://jend.leeeet.dev/read.txt?path=yaml-for-bend@0.1.1.0/core.bend&start_line=112&end_line=117

import Base
import yaml-for-bend@0.1.1.0/value.bend as V

def must(m: Maybe<&2, V.Yaml>, +tag: String, +s: String) -> Result<&2, &2, String, V.Yaml>:
  match m:
    case Some{v}:
      Done{v}
    case None{}:
      Fail{"found a value that isn't a " ++ tag ++ ": " ++ s}

Uses (5):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Maybe
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Result
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=String
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=String.append
  https://jend.leeeet.dev/definition.txt?path=yaml-for-bend@0.1.1.0/value.bend&name=Yaml