code: def setUp(self):
      super(GradientMapsTest, self).setUp()
      self.ig = gradient_maps.IntegratedGradients()
  
file_path: lit/lit_nlp/components/gradient_maps_test.py
imports: from absl.testing import absltest
  from absl.testing import parameterized
  from lit_nlp.api import dataset
  from lit_nlp.components import gradient_maps
  from lit_nlp.lib import testing_utils
  import numpy
label_desc: Use image node_id 1 for calling the GradientMapsTest obj's underlying member method code with example usage: obj.setUp() without return types