code: def test_closure_processing(self):
      def simple_function(x):
          return x + 10
  
      serialized = python_utils.func_dump(simple_function)
      deserialized = python_utils.func_load(serialized)
      self.assertEqual(deserialized(5), 15)
  
file_path: keras/keras/utils/python_utils_test.py
imports: import base64
  import marshal
  from keras import testing
  from keras.utils import python_utils
label_desc: Use image node_id 9 for calling the PythonUtilsTest obj's underlying member method code with example usage: obj.test_closure_processing() and returns: unknown