code: def test_get_invalid_name(self):
      self.assertIsNone(
          registration.get_registered_class("invalid name")
      )
  
imports: from absl.testing import parameterized
  from tensorflow.python.eager import test
  from tensorflow.python.saved_model import registration
  from tensorflow.python.trackable import base
label_desc: Use image node_id 2 for calling the SerializableRegistrationTest obj's underlying member method code with example usage: obj.test_get_invalid_name() without return types