code: def add_unknown_members(self, members):
          
          if not isinstance(members, list):
              members = [members]
  
          if not hasattr(self, 'unknown_members'):
              self.unknown_members = members
          else:
              self.unknown_members.extend(members)
docs: Add a new member to the unknown members list
  
          :param member: member name
          :type member: str
          :return: None