code: def _generate_instance_name(self):
      return "worker-" + str(uuid.uuid4())
  
imports: import os
  import time
  import googleapiclient.discovery
  import uuid
  import math
  import json
  from studio import git_util
  from studio.util import logs
  from studio.util.gpu_util import memstr2int
  from .cloud_worker_util import insert_user_startup_script
label_desc: Use image node_id 6 for calling the GCloudWorkerManager obj's underlying member method code with example usage: obj._generate_instance_name() and returns: unknown