code: def setUp(self):
      super(PrefetchWithSlackTest, self).setUp()
      self._devices = self.configureDevicesForMultiDeviceTest(3)
  
file_path: tensorflow-upstream/tensorflow/python/data/experimental/kernel_tests/prefetch_with_slack_test.py
imports: from absl.testing import parameterized
  from tensorflow.python.data.kernel_tests import test_base
  from tensorflow.python.data.ops import dataset_ops
  from tensorflow.python.data.ops import multi_device_iterator_ops
  from tensorflow.python.data.ops import options
  from tensorflow.python.framework import combinations
  from tensorflow.python.framework import errors
  from tensorflow.python.platform import test
label_desc: Use image node_id 1 for calling the PrefetchWithSlackTest obj's underlying member method code with example usage: obj.setUp() without return types