code: def named_replicators() -> (
      Sequence[Tuple[str, Callable[[], Strategy]]]
  ):
      return (
          ("TpuReplicator", _tpu_replicator_or_skip_test),
          ("Replicator", _replicator_primary_device),
      )
  
imports: from typing import Callable, Sequence, Tuple
  import unittest
  from absl import logging
  from sonnet.src.distribute import replicator
  import tensorflow
label_desc: Use image node_id 3 for calling a global function with example usage: named_replicators() and returns: str,  _tpu_replicator_or_skip_test,  str,  _replicator_primary_device