code: def function_2(x):
      return -1 * x + 11
  
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 2 for calling a global function with example usage: function_2(x) and returns: unknown