docstr: Executes an arbitrary function on self.
code: def execute(self, func: Callable) -> Any:
      """Executes an arbitrary function on self."""
      return func(self)
  
file_path: horovod/horovod/ray/utils.py
imports: from typing import List, Optional, Callable, Any, Dict
  from contextlib import contextmanager
  import ray
  from horovod.runner.driver import driver_service
  from horovod.ray.driver_service import _driver_fn
  from horovod.runner.util import network
label_desc: Use image node_id 1 for calling the _DiscoveryActor obj's underlying member method code with example usage: obj.execute(func) and returns: func