code: def test_Speed(self):
      self.evaluate_class(audaugs.Speed(factor=3.0), fname="speed")
  
imports: import json
  import random
  import unittest
  import numpy
  from augly import audio
  from augly.tests.audio_tests.base_unit_test import BaseAudioUnitTest
  from augly.utils import AUDIO_METADATA_PATH
label_desc: Use image node_id 21 for calling the TransformsAudioUnitTest obj's underlying member method code with example usage: obj.test_Speed() without return types