Migrate.slot.fill: def of bend-kit-migrate@0.3.0.0
Import: import bend-kit-migrate@0.3.0.0/migrate.bend as Migrate
Lines 377-382 of bend-kit-migrate@0.3.0.0/migrate.bend: https://jend.leeeet.dev/read.txt?path=bend-kit-migrate@0.3.0.0/migrate.bend&start_line=377&end_line=382

import Base

def slot.fill(m: Maybe<&1, Scalar>, x: Scalar, k: Key) -> Result<&1, &1, Error, Maybe<&1, Scalar>>:
  match m:
    case None{}:
      Done{Some{x}}
    case Some{y}:
      Fail{Duplicate{k}}

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=bend-kit-migrate@0.3.0.0/migrate.bend&name=Error
  https://jend.leeeet.dev/definition.txt?path=bend-kit-migrate@0.3.0.0/migrate.bend&name=Key
  https://jend.leeeet.dev/definition.txt?path=bend-kit-migrate@0.3.0.0/migrate.bend&name=Scalar