Fixed.keep: def of bend-collections-laws-math@1.0.0.0
Import: import bend-collections-laws-math@1.0.0.0/spec/math/fixed.bend as Fixed
Lines 48-53 of bend-collections-laws-math@1.0.0.0/spec/math/fixed.bend: https://jend.leeeet.dev/read.txt?path=bend-collections-laws-math@1.0.0.0/spec/math/fixed.bend&start_line=48&end_line=53

import Base

def keep(ok: Bool, +n: Nat) -> Maybe<&2, Nat>:
  match ok:
    case True{}:
      Some{n}
    case False{}:
      None{}

Uses (3):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Maybe
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat