code: def test_merge_call(self):
      with ops.Graph().as_default():
          # The test is testing a v1 only function.
          if not test.is_gpu_available():
              self.skipTest("No GPU available")
  
          def fn():
              var1 = variable_scope.get_variable(
                  "var1",
                  shape=[],
                  initializer=init_ops.constant_initializer(21.0),
              )
              distribute_lib.get_replica_context().merge_call(
                  lambda _: ()
              )
              var2 = variable_scope.get_variable(
                  "var2",
                  shape=[],
                  initializer=init_ops.constant_initializer(2.0),
              )
              return var1 * var2
  
          temp = template.make_template("my_template", fn)
  
          strategy = mirrored_strategy.MirroredStrategy(
              ["/cpu:0", "/gpu:0"]
          )
          out = strategy.experimental_local_results(strategy.run(temp))
  
          self.evaluate(variables.global_variables_initializer())
          self.assertAllEqual([42.0, 42.0], self.evaluate(out))
  
file_path: tensorflow/tensorflow/python/distribute/template_mirrored_strategy_test.py
imports: from tensorflow.python.distribute import distribute_lib
  from tensorflow.python.distribute import mirrored_strategy
  from tensorflow.python.framework import ops
  from tensorflow.python.framework import test_util
  from tensorflow.python.ops import init_ops
  from tensorflow.python.ops import template
  from tensorflow.python.ops import variable_scope
  from tensorflow.python.ops import variables
  from tensorflow.python.platform import test
label_desc: Use image node_id 1 for calling the TemplateMirroredStrategyTest obj's underlying member method code with example usage: obj.test_merge_call() and returns: unknown