code: def _next_id(self) -> int:
      assert self.lock.locked()
      self._req_id += 1
      if self._req_id > INT32_MAX:
          self._req_id = 1
      # Responses that aren't tracked (like opportunistic releases)
      # have req_id=0, so make sure we never mint such an id.
      assert self._req_id != 0
      return self._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 2 for calling the DataClient obj's underlying member method code with example usage: obj._next_id() and returns: self