code: def test_function(x):
      """Test Function Docstring."""
      return x + 1
  
imports: import functools
  import inspect
  from tensorflow.python.platform import test
  from tensorflow.python.platform import tf_logging
  from tensorflow.python.util import tf_decorator
  from tensorflow.python.util import tf_inspect
label_desc: Use image node_id 5 for calling a global function with example usage: test_function(x) and returns: unknown