code: def function_1(x):
      return x * x * x
  
file_path: tensorflow-upstream/tensorflow/python/autograph/tests/call_to_user_function_test.py
imports: import tensorflow
  from tensorflow.python.autograph.tests import reference_test_base
label_desc: Use image node_id 1 for calling a global function with example usage: function_1(x) and returns: unknown