Codes.group.at: def of bolt@1.27.0.0
Import: import bolt@1.27.0.0/src/codes.bend as Codes
Lines 83-89 of bolt@1.27.0.0/src/codes.bend: https://jend.leeeet.dev/read.txt?path=bolt@1.27.0.0/src/codes.bend&start_line=83&end_line=89

import Base

# the group; empty when the slug is not a rule
def group.at(mm: Maybe<&2, Entry>) -> String:
  match mm:
    case None{}:
      ""
    case Some{Entry{_s, _id, +grp}}:
      grp

Uses (3):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Maybe
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=String
  https://jend.leeeet.dev/definition.txt?path=bolt@1.27.0.0/src/codes.bend&name=Entry