code: def test_lock_act_norm_layers(self):
      config = GlowTTSConfig(num_chars=32)
      model = GlowTTS(config).to(device)
      model.lock_act_norm_layers()
      for f in model.decoder.flows:
          if getattr(f, "set_ddi", False):
              self.assertTrue(f.initialized)
  
imports: import copy
  import os
  import unittest
  import torch
  from torch import optim
  from trainer.logging.tensorboard_logger import TensorboardLogger
  from tests import get_tests_data_path, get_tests_input_path, get_tests_output_path
  from TTS.tts.configs.glow_tts_config import GlowTTSConfig
  from TTS.tts.layers.losses import GlowTTSLoss
  from TTS.tts.models.glow_tts import GlowTTS
  from TTS.tts.utils.speakers import SpeakerManager
  from TTS.utils.audio import AudioProcessor
label_desc: Use image node_id 5 for calling the TestGlowTTS obj's underlying member method code with example usage: obj.test_lock_act_norm_layers() without return types