Concat.either: def of bolt@1.27.0.0
Import: import bolt@1.27.0.0/src/rules/suspicious/concat.bend as Concat
Lines 110-116 of bolt@1.27.0.0/src/rules/suspicious/concat.bend: https://jend.leeeet.dev/read.txt?path=bolt@1.27.0.0/src/rules/suspicious/concat.bend&start_line=110&end_line=116

import Base
import bolt@1.27.0.0/src/syntax/lex.bend as Lex

# the first maybe when it holds a token, else the second
def either(aa: Maybe<&2, Lex.Tok>, bb: Maybe<&2, Lex.Tok>) -> Maybe<&2, Lex.Tok>:
  match aa:
    case None{}:
      bb
    case Some{tok}:
      Some{tok}

Uses (2):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Maybe
  https://jend.leeeet.dev/definition.txt?path=bolt@1.27.0.0/src/syntax/lex.bend&name=Tok