code: def testResolveAlwaysSupported(self):
      r = registry.MultiImplRegister("test")
      r.add_implementation(TestImpl(lambda _: True, lambda _: 100))
      r.add_implementation(TestImpl(lambda _: False, fail_fn))
  
      self.assertEqual(r(1), 100)
  
file_path: hub/tensorflow_hub/registry_test.py
imports: import tensorflow
  from tensorflow_hub import registry
label_desc: Use image node_id 1 for calling the RegistryTest obj's underlying member method code with example usage: obj.testResolveAlwaysSupported() without return types