code: def close(self):
      if self.initialized:
          self.initialized = False
          ray.shutdown()
  
imports: import logging
  import traceback
  from orion.core.utils.module_import import ImportOptional
  from orion.executor.base import AsyncException, AsyncResult, BaseExecutor, ExecutorClosed, Future
label_desc: Use image node_id 2 for calling the Ray obj's underlying member method code with example usage: obj.close() without return types