code: def name():
      return "ray"
  
file_path: mars/mars/oscar/backends/ray/backend.py
imports: import logging
  from typing import Dict
  from ....utils import lazy_import, Timer
  from ...backend import BaseActorBackend, register_backend
  from ..context import MarsActorContext
  from .driver import RayActorDriver
  from .pool import RayMainPool
  from .utils import process_address_to_placement, get_placement_group
label_desc: Use image node_id 1 for calling the RayActorBackend obj's underlying member method code with example usage: obj.name() and returns: str