code: def roles_descending(cls) -> List[Tuple[int, Self]]:
      tuples = []
      for x in cls:
          tuples.append((x.value, x))
      return sorted(tuples, reverse=True)
  
file_path: PySyft/packages/syft/src/syft/service/user/user_roles.py
imports: from enum import Enum
  from typing import Any
  from typing import List
  from typing import Tuple
  from typing import Union
  from typing_extensions import Self
  from ...serde.serializable import serializable
label_desc: Use image node_id 1 for calling the ServiceRole obj's underlying member method code with example usage: obj.roles_descending(cls) and returns: sorted