class_docstr: Launch collectives on one replica.
class_docstr_tok: ["Launch","collectives","on","one","replica","."]
code: def _use_unique_instance_key(self):
      if not ops.executing_eagerly_outside_functions():
          return False
      return CollectiveReplicaLauncher._prefer_unique_instance_key
  
imports: import copy
  import threading
  from typing import Callable, List, Optional, Union
  from tensorflow.python.distribute import collective_util
  from tensorflow.python.distribute import values
  from tensorflow.python.eager import backprop_util
  from tensorflow.python.eager import context
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import indexed_slices
  from tensorflow.python.framework import ops
  from tensorflow.python.framework import tensor_spec
  from tensorflow.python.ops import array_ops
  from tensorflow.python.ops import collective_ops
  from tensorflow.python.ops import cond
  from tensorflow.python.ops import math_ops
  from tensorflow.python.ops import nccl_ops
  from tensorflow.python.ops import resource_variable_ops
  from tensorflow.python.platform import tf_logging
  from tensorflow.python.types import core
label_desc: Use image node_id 3 for calling the CollectiveReplicaLauncher obj's underlying member method code with example usage: obj._use_unique_instance_key() and returns: CollectiveReplicaLauncher, False