code: def test_melscale_load_save(self):
      specgram = torch.ones(1, 201, 100)
      melscale_transform = transforms.MelScale()
      melscale_transform(specgram)
  
      melscale_transform_copy = transforms.MelScale()
      melscale_transform_copy.load_state_dict(
          melscale_transform.state_dict()
      )
  
      fb = melscale_transform.fb
      fb_copy = melscale_transform_copy.fb
  
      self.assertEqual(fb_copy.size(), (201, 128))
      self.assertEqual(fb, fb_copy)
  
imports: import math
  import torch
  import torchaudio
  import torchaudio.functional
  import torchaudio.transforms
  from torchaudio_unittest import common_utils
label_desc: Use image node_id 4 for calling the Tester obj's underlying member method code with example usage: obj.test_melscale_load_save() without return types