docs: def by_group(self):  # pragma: no cover
          """
          Display group membership sorted by group.
  
          Returns:
              Array with a dictionary of group membership.
                  For example: {'testgroup': ['test.user', 'test.user2']}
  
          """
          group_membership = {}
          for record in self.__get_groups_with_membership():
              group_membership[record.cn.value] = [
                  i for i in record.memberUid.values
              ]
          return group_membership