code: def test_invalid_init(self):
      with self.assertRaisesRegex(
          ValueError, "Multiple keys/values found"
      ):
          _ = mode_keys.ModeKeyMap(
              **{
                  mode_keys.KerasModeKeys.PREDICT: 3,
                  mode_keys.EstimatorModeKeys.PREDICT: 1,
              }
          )
  
imports: from tensorflow.python.platform import test
  from tensorflow.python.saved_model.model_utils import mode_keys
label_desc: Use image node_id 2 for calling the ModeKeyMapTest obj's underlying member method code with example usage: obj.test_invalid_init() without return types