docs: def deck_issue_mode(proto: DeckSpawnProto) -> Iterable[str]:
      '''interpret issue mode bitfeg'''
  
      if proto.issue_mode == 0:
          yield "NONE"
          return
  
      for mode, value in proto.MODE.items():
          if value > proto.issue_mode:
              continue
          if value & proto.issue_mode:
              yield mode