code: def testLimitedRetracing(self):
      trace_count = [0]
  
      @def_function.function
      def f(iterator):
          trace_count[0] += 1
          counter = np.int64(0)
          for _ in range(5):
              elem = next(iterator)
              counter += elem[0]
              counter += elem[1]
          return counter
  
      dataset = dataset_ops.Dataset.range(10)
      dataset2 = dataset_ops.Dataset.range(20)
  
      for _ in range(10):
          multi_device_iterator = (
              multi_device_iterator_ops.OwnedMultiDeviceIterator(
                  dataset, [self._devices[1], self._devices[2]]
              )
          )
          self.assertEqual(self.evaluate(f(multi_device_iterator)), 45)
          multi_device_iterator2 = (
              multi_device_iterator_ops.OwnedMultiDeviceIterator(
                  dataset2, [self._devices[1], self._devices[2]]
              )
          )
          self.assertEqual(self.evaluate(f(multi_device_iterator2)), 45)
          self.assertEqual(trace_count[0], 1)
  
imports: from absl.testing import parameterized
  import numpy
  from tensorflow.python.data.experimental.ops import testing
  from tensorflow.python.data.kernel_tests import test_base
  from tensorflow.python.data.ops import dataset_ops
  from tensorflow.python.data.ops import from_generator_op
  from tensorflow.python.data.ops import multi_device_iterator_ops
  from tensorflow.python.data.ops import options
  from tensorflow.python.eager import cancellation
  from tensorflow.python.eager import context
  from tensorflow.python.eager import def_function
  from tensorflow.python.eager import executor
  from tensorflow.python.framework import combinations
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import errors
  from tensorflow.python.framework import ops
  from tensorflow.python.framework import tensor_spec
  from tensorflow.python.ops import data_flow_ops
  from tensorflow.python.platform import test
label_desc: Use image node_id 6 for calling the OwnedMultiDeviceIteratorTest obj's underlying member method code with example usage: obj.testLimitedRetracing() and returns: counter