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. Max of 25 groups.
  
          :param groups_to_display: Unsubscribe groups to display
          :type groups_to_display: GroupsToDisplay, list(int), optional
          """
          if isinstance(value, GroupsToDisplay):
              self._groups_to_display = value
          else:
              self._groups_to_display = GroupsToDisplay(value)