Maybe.is_none: def of Base
Import: import Base
Lines 847-848 of Base/base.bend: https://jend.leeeet.dev/read.txt?path=Base/base.bend&start_line=847&end_line=848

import Base

def Maybe.is_none(a, -A: Kind(a), m: Maybe<a, A>) -> Bool:
  Bool.not(Maybe.is_some(a, A, m))

Uses (4):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool.not
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Maybe
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Maybe.is_some