docstr: Puts an acknowledge request on the request queue periodically.
  Lock should be held before calling this. Used when an async or
  blocking response is received.
code: def _acknowledge(self, req_id: int) -> None:
      """
      Puts an acknowledge request on the request queue periodically.
      Lock should be held before calling this. Used when an async or
      blocking response is received.
      """
      if not self.client_worker._reconnect_enabled:
          # Skip ACKs if reconnect isn't enabled
          return
      assert self.lock.locked()
      self._acknowledge_counter += 1
      if self._acknowledge_counter % ACKNOWLEDGE_BATCH_SIZE == 0:
          self.request_queue.put(
              ray_client_pb2.DataRequest(
                  acknowledge=ray_client_pb2.AcknowledgeRequest(
                      req_id=req_id
                  )
              )
          )
  
imports: import math
  import logging
  import queue
  import threading
  import warnings
  import grpc
  from collections import OrderedDict
  from typing import Any, Callable, Dict, TYPE_CHECKING, Optional, Union
  import ray.core.generated.ray_client_pb2
  import ray.core.generated.ray_client_pb2_grpc
  from ray.util.client.common import INT32_MAX, OBJECT_TRANSFER_CHUNK_SIZE, OBJECT_TRANSFER_WARNING_SIZE
  from ray.util.debug import log_once
label_desc: Use image node_id 9 for calling the DataClient obj's underlying member method code with example usage: obj._acknowledge(req_id) without return types