code: def get_coordinator_address(cls) -> str:
      coordinator_address = get_tpu_env_value(
          "MEGASCALE_COORDINATOR_ADDRESS"
      )
      coordinator_address = coordinator_address.split(":")[0]
  
      # The coordinator may not be up before the other hosts try to
      # communicate with it. We check for its existence with retries.
      coordinator_found = False
      lookup_attempt = 1
      max_coordinator_lookups = 50
      while (
          not coordinator_found
          and lookup_attempt <= max_coordinator_lookups
      ):
          try:
              ip_address = socket.gethostbyname(coordinator_address)
              coordinator_found = True
          except socket.gaierror:
              print(
                  f"Failed to recognize coordinator address {coordinator_address} on attempt {lookup_attempt}, retrying..."
              )
              lookup_attempt += 1
              time.sleep(5)
  
      if not coordinator_found:
          raise RuntimeError(
              f"Failed to recognize coordinator address {coordinator_address}"
          )
  
      # Use a different port for the jax coordinator than the MXLA coordinator,
      # which is set to 8080 in multislice GCE.
      return f"{coordinator_address}:{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 MultisliceGceTpuCluster obj's underlying member method code with example usage: obj.get_coordinator_address(cls) and returns: coordinator_address, str, coordinator_port