code: def forward_wrapper(self, spec, z=None):
      spec, z = taco2wg(spec, z)
      audio = self.waveglow.norm_dist_to_audio(
          spec=spec, sigma=1.0, z=z
      )
      return audio
  
file_path: NeMo/tests/collections/tts/test_waveglow.py
imports: import os
  import tempfile
  import pytest
  import torch
  from omegaconf import DictConfig
  from nemo.collections.tts.models import WaveGlowModel
  from nemo.core.classes import typecheck
label_desc: Use image node_id 3 for calling a global function with example usage: forward_wrapper(spec, z) and returns: audio