code: def synchronize(message="sync-workers"):
      if is_xla():
          xm.rendezvous(message)
      elif not dist.is_available():
          return
      if not dist.is_nccl_available():
          return
      if not dist.is_initialized():
          return
  
      world_size = dist.get_world_size()
  
      if world_size == 1:
          return
  
      dist.barrier()
  
imports: import contextlib
  import logging
  import os
  import pickle
  import socket
  import subprocess
  import warnings
  from itertools import chain
  import torch
  from mmf.common.registry import registry
  from torch import distributed
label_desc: Use image node_id 1 for calling a global function with example usage: synchronize(message) without return types