Concat.push: def of bolt@1.27.0.0
Import: import bolt@1.27.0.0/src/rules/suspicious/concat.bend as Concat
Lines 161-167 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=161&end_line=167

import Base

# the lets in scope after one more, when there is one
def push(mm: Maybe<&2, Let>, +lets: List<&2, Let>) -> List<&2, Let>:
  match mm:
    case None{}:
      lets
    case Some{lt}:
      lt <> lets

Uses (3):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List
  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/rules/suspicious/concat.bend&name=Let