code: def wait_for_dispatcher_registration(
      self, dispatcher_id, timeout
  ) -> str:
      resp = self._send(
          WaitForDispatcherRegistrationRequest(dispatcher_id, timeout)
      )
      return resp.dispatcher_address
  
imports: import threading
  from horovod.runner.common.util import timeout, network
  from horovod.runner.common.util.network import AckResponse
  from horovod.runner.common.util.timeout import TimeoutException
  from horovod.runner.util.threads import in_thread
label_desc: Use image node_id 3 for calling the ComputeClient obj's underlying member method code with example usage: obj.wait_for_dispatcher_registration(dispatcher_id, timeout) and returns: resp