class_docstr: Common tests for noisy location-scale family of distributions.
code: def test_quantizes_to_mode_decimal_part(self):
      dist = self.dist_cls(loc=-3.75, scale=1.0)
      self.assertEqual(helpers.quantization_offset(dist), 0.25)
  
imports: import tensorflow
  from tensorflow_compression.python.distributions import helpers
  from tensorflow_compression.python.distributions import uniform_noise
label_desc: Use image node_id 9 for calling the LocationScaleTest obj's underlying member method code with example usage: obj.test_quantizes_to_mode_decimal_part() without return types