code: def test_methods(self):
      config = FreeVCConfig()
      model = FreeVC(config).to(device)
      model.load_pretrained_speaker_encoder()
      model.init_multispeaker(config)
      wavlm_feats = model.extract_wavlm_features(torch.rand(1, 16000))
      assert wavlm_feats.shape == (1, 1024, 49), wavlm_feats.shape
  
imports: import os
  import unittest
  import torch
  from tests import get_tests_input_path
  from TTS.vc.configs.freevc_config import FreeVCConfig
  from TTS.vc.models.freevc import FreeVC
label_desc: Use image node_id 4 for calling the TestFreeVC obj's underlying member method code with example usage: obj.test_methods() without return types