Regex.required.join: def of bend-kit-regex@0.8.0.0
Import: import bend-kit-regex@0.8.0.0/regex.bend as Regex
Lines 570-575 of bend-kit-regex@0.8.0.0/regex.bend: https://jend.leeeet.dev/read.txt?path=bend-kit-regex@0.8.0.0/regex.bend&start_line=570&end_line=575

import Base

def required.join(right: Maybe<&2, Node>, left: Maybe<&2, Node>, a: Node) -> Maybe<&2, Node>:
  match right:
    case Some{r}:
      Some{NCat{a, r}}
    case None{}:
      left

Uses (2):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Maybe
  https://jend.leeeet.dev/definition.txt?path=bend-kit-regex@0.8.0.0/regex.bend&name=Node