code: def test_apply_lambda_intensity(self):
      intensity = audaugs.apply_lambda_intensity(
          metadata={}, aug_function=lambda x, y: (x, y)
      )
      self.assertAlmostEqual(intensity, 100.0)
  
imports: import unittest
  import numpy
  from augly import audio
label_desc: Use image node_id 2 for calling the IntensityAudioUnitTest obj's underlying member method code with example usage: obj.test_apply_lambda_intensity() without return types