code: def set_ranks_to_indices(self, ranks_to_indices):
      self._lock.acquire()
      try:
          self._ranks_to_indices = ranks_to_indices.copy()
      finally:
          self._lock.release()
  
imports: import threading
  from horovod.runner.common.service import driver_service
  from horovod.runner.common.util import network
label_desc: Use image node_id 3 for calling the SparkDriverService obj's underlying member method code with example usage: obj.set_ranks_to_indices(ranks_to_indices) without return types