code: def load_vocoder(self, model_file, model_config, use_cuda):
      self.vocoder_config = load_config(model_config)
      self.vocoder_ap = AudioProcessor(**self.vocoder_config["audio"])
      self.vocoder_model = setup_generator(self.vocoder_config)
      self.vocoder_model.load_checkpoint(
          self.vocoder_config, model_file, eval=True
      )
      if use_cuda:
          self.vocoder_model.cuda()
  
imports: import time
  import numpy
  import torch
  import pysbd
  from TTS.utils.audio import AudioProcessor
  from TTS.utils.io import load_config
  from TTS.tts.utils.generic_utils import setup_model
  from TTS.tts.utils.speakers import load_speaker_mapping
  from TTS.vocoder.utils.generic_utils import setup_generator, interpolate_vocoder_input
  from TTS.tts.utils.synthesis import *
  from TTS.tts.utils.text import make_symbols, phonemes, symbols
label_desc: Use image node_id 6 for calling the Synthesizer obj's underlying member method code with example usage: obj.load_vocoder(model_file, model_config, use_cuda) without return types