docs: def groups_to_display(self, value):
          """An array containing the unsubscribe groups that you would like to be
          displayed on the unsubscribe preferences page.
  
          :param value: An array containing the unsubscribe groups that you
                        would like to be displayed on the unsubscribe
                        preferences page.
          :type value: array(int)
          """
          if value is not None and len(value) > 25:
              raise ValueError("New groups_to_display exceeds max length of 25.")
          self._groups_to_display = value