code: def test_external(self):
      self.assertFunctionMatchesEager(
          external_lambda, 1, lambda x: x == 0
      )
      self.assertFunctionMatchesEager(
          external_lambda, tf.constant(1), lambda x: x == 0
      )
  
file_path: tensorflow-upstream/tensorflow/python/autograph/tests/call_to_lambda_function_test.py
imports: import tensorflow.compat.v1
  from tensorflow.python.autograph.tests import reference_test_base
label_desc: Use image node_id 2 for calling the ReferenceTest obj's underlying member method code with example usage: obj.test_external() without return types