docs: def this_update(self, value):
          """
          A datetime.datetime object of when the response was generated.
          """
  
          if not isinstance(value, datetime):
              raise TypeError(_pretty_message(
                  '''
                  this_update must be an instance of datetime.datetime, not %s
                  ''',
                  _type_name(value)
              ))
  
          self._this_update = value