code: def testRaisesError_UnsupportedLayer(self):
      with self.assertRaises(ValueError):
          self.quantize_registry.get_quantize_config(self.CustomLayer())
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import unittest
  from absl.testing import parameterized
  import numpy
  import tensorflow
  from tensorflow_model_optimization.python.core.quantization.keras import quantizers
  from tensorflow_model_optimization.python.core.quantization.keras import utils
  from tensorflow_model_optimization.python.core.quantization.keras.experimental.default_n_bit import default_n_bit_quantize_registry
label_desc: Use image node_id 8 for calling the QuantizeRegistryTest obj's underlying member method code with example usage: obj.testRaisesError_UnsupportedLayer() without return types