code: def test_variables_are_not_enumerated_when_overridden(self):
      layer = signal_conv.SignalConv2D(1, 1)
      layer.kernel_parameter = [[[[1]]]]
      layer.bias_parameter = [0]
      layer.build((None, None, None, 1))
      self.assertEmpty(layer.weights)
      self.assertEmpty(layer.trainable_weights)
  
imports: import os
  from absl.testing import parameterized
  import numpy
  import scipy.signal
  import tensorflow
  from tensorflow_compression.python.layers import initializers
  from tensorflow_compression.python.layers import parameters
  from tensorflow_compression.python.layers import signal_conv
label_desc: Use image node_id 4 for calling the SignalConvTest obj's underlying member method code with example usage: obj.test_variables_are_not_enumerated_when_overridden() without return types