code: def _handle(self, req, client_address):
      if isinstance(req, RegisterTaskRequest):
          self._wait_cond.acquire()
          try:
              assert 0 <= req.index < self._num_proc
              self._all_task_addresses[req.index] = req.task_addresses
              # Just use source address for service for fast probing.
              self._task_addresses_for_driver[
                  req.index
              ] = self._filter_by_ip(
                  req.task_addresses, client_address[0]
              )
              # Make host hash -> indices map.
              if req.host_hash not in self._task_host_hash_indices:
                  self._task_host_hash_indices[req.host_hash] = []
              self._task_host_hash_indices[req.host_hash].append(
                  req.index
              )
              self._task_host_hash_indices[req.host_hash].sort()
          finally:
              self._wait_cond.notify_all()
              self._wait_cond.release()
          return network.AckResponse()
  
      if isinstance(req, RegisterTaskToTaskAddressesRequest):
          self._wait_cond.acquire()
          try:
              assert 0 <= req.index < self._num_proc
              self._task_addresses_for_tasks[
                  req.index
              ] = req.task_addresses
          finally:
              self._wait_cond.notify_all()
              self._wait_cond.release()
          return network.AckResponse()
  
      if isinstance(req, AllTaskAddressesRequest):
          return AllTaskAddressesResponse(
              self._all_task_addresses[req.index]
          )
  
      return super(BasicDriverService, self)._handle(
          req, client_address
      )
  
imports: import threading
  from bluefog.run.horovodrun.common.util import network
label_desc: Use image node_id 2 for calling the BasicDriverService obj's underlying member method code with example usage: obj._handle(req, client_address) and returns: super, network, network, AllTaskAddressesResponse