code: def _save_return_saver(self, sess, var):
      saver = saver_lib.Saver(var_list=[var])
      test_dir = self.get_temp_dir()
      prefix = os.path.join(test_dir, "ckpt")
      return saver.save(sess, prefix), saver
  
imports: import os
  from absl.testing import parameterized
  from tensorflow.core.protobuf import config_pb2
  from tensorflow.python.distribute import combinations
  from tensorflow.python.distribute import strategy_combinations
  from tensorflow.python.distribute import strategy_test_lib
  from tensorflow.python.distribute import test_util
  from tensorflow.python.distribute import tpu_values
  from tensorflow.python.distribute import values
  from tensorflow.python.eager import context
  from tensorflow.python.eager import test
  from tensorflow.python.framework import constant_op
  from tensorflow.python.framework import ops
  from tensorflow.python.framework import test_util
  from tensorflow.python.ops import math_ops
  from tensorflow.python.ops import variable_scope
  from tensorflow.python.training import saver
label_desc: Use image node_id 2 for calling the MirroredVariableSaveRestoreTest obj's underlying member method code with example usage: obj._save_return_saver(sess, var) and returns: saver,  saver