docs: def _render_extended_error_message_list(self, extended_error):
          """Parse the ExtendedError object and retruns the message.
  
          Build a list of decoded messages from the extended_error using the
          message registries. An ExtendedError JSON object is a response from
          the with its own schema.  This function knows how to parse the
          ExtendedError object and, using any loaded message registries,
          render an array of plain language strings that represent
          the response.
          """
          messages = []
          if isinstance(extended_error, dict):
              if ('Type' in extended_error and
                      extended_error['Type'].startswith('ExtendedError.')):
                  for msg in extended_error['Messages']:
                      message_id = msg['MessageID']
                      x = message_id.split('.')
                      registry = x[0]
                      msgkey = x[len(x) - 1]
  
                      # if the correct message registry is loaded,
                      # do string resolution
                      if (registry in self.message_registries and msgkey in
                              self.message_registries[registry]['Messages']):
                          rmsgs = self.message_registries[registry]['Messages']
                          msg_dict = rmsgs[msgkey]
                          msg_str = message_id + ':  ' + msg_dict['Message']
  
                          for argn in range(0, msg_dict['NumberOfArgs']):
                              subst = '%' + str(argn+1)
                              m = str(msg['MessageArgs'][argn])
                              msg_str = msg_str.replace(subst, m)
  
                          if ('Resolution' in msg_dict and
                                  msg_dict['Resolution'] != 'None'):
                              msg_str += '  ' + msg_dict['Resolution']
  
                          messages.append(msg_str)
                      else:
                          # no message registry, simply return the msg object
                          # in string form
                          messages.append(str(message_id))
  
          return messages