code: def uri(self):
      return self._id
  
imports: import logging
  import os
  import threading
  import uuid
  import weakref
  from collections import defaultdict
  from copy import deepcopy
  from typing import Tuple
  import aim.ext.transport.proto.remote_tracking_pb2
  import aim.ext.transport.proto.remote_router_pb2
  import aim.ext.transport.proto.remote_tracking_pb2_grpc
  import aim.ext.transport.proto.remote_router_pb2_grpc
  from aim.ext.transport.message_utils import pack_stream, unpack_stream, raise_exception
  from aim.ext.transport.rpc_queue import RpcQueueWithRetry
  from aim.ext.transport.heartbeat import RPCHeartbeatSender
  from aim.ext.transport.config import AIM_CLIENT_SSL_CERTIFICATES_FILE, AIM_RT_MAX_MESSAGE_SIZE, AIM_RT_DEFAULT_MAX_MESSAGE_SIZE, AIM_CLIENT_QUEUE_MAX_MEMORY
  from aim.storage.treeutils import encode_tree, decode_tree
label_desc: Use image node_id 21 for calling the Client obj's underlying member method code with example usage: obj.uri() and returns: self