code: def is_main_replica(replica_id):
      if isinstance(replica_id, int):
          return replica_id == 0
      return all(r == 0 for r in replica_id)
  
imports: import logging
  from dataclasses import dataclass, replace
  from itertools import chain
  from typing import Any, Callable, Dict, Optional, Tuple, Union
  import numpy
  import torch
  from .core import CheckpointingException
  from .dict_utils import dict_list_map_inplace, dict_list_map_outplace
label_desc: Use image node_id 1 for calling a global function with example usage: is_main_replica(replica_id) and returns: all, unknown