code: def get_coordinator_address(cls) -> str:
      return f"{get_gce_worker_endpoints()[0].split(':')[2]}:{coordinator_port}"
  
imports: from __future__ import annotations
  import os
  import re
  import socket
  import time
  from jax._src import clusters
  from jax._src.cloud_tpu_init import running_in_cloud_tpu_vm
label_desc: Use image node_id 2 for calling the SingleSliceGceTpuCluster obj's underlying member method code with example usage: obj.get_coordinator_address(cls) and returns: get_gce_worker_endpoints, str, coordinator_port