code: def test_2d(self):
      result = zero_out_op_2.zero_out([[6, 5, 4], [3, 2, 1]])
      self.assertAllEqual(result, [[6, 0, 0], [0, 0, 0]])
  
file_path: tensorflow-upstream/tensorflow/examples/adding_an_op/zero_out_2_test.py
imports: import tensorflow
  from tensorflow.examples.adding_an_op import zero_out_grad_2
  from tensorflow.examples.adding_an_op import zero_out_op_2
label_desc: Use image node_id 2 for calling the ZeroOut2Test obj's underlying member method code with example usage: obj.test_2d() without return types