docs: def _listAttrGroupMembers(self, attrGroup):
          """
          Returns a list of all members in the attribute group.
          """
          from inspect import getmembers, ismethod
          methods = getmembers(self, ismethod)
          group_prefix = attrGroup + '_'
          group_len = len(group_prefix)
          group_members = [method[0][group_len:]
                           for method in methods
                           if method[0].startswith(group_prefix)]
          return group_members