code: def static_fn(x):
      a = function_1(x)
      b = function_2(x)
      return a + b
  
file_path: tensorflow/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 4 for calling a global function with example usage: static_fn(x) and returns: unknown