code: def _get_image_saver():
      """Returns the TorchVision image saver, if available
      or None if it is not - optional dependency"""
      try:
          import torchvision
  
          return torchvision.utils.save_image
      except ImportError:
          logger.warning(
              "torchvision is not available - cannot save figures"
          )
          return None
  
imports: import logging
  import torch
  import os
  from speechbrain.utils.distributed import main_process_only, if_main_process
label_desc: Use image node_id 1 for calling a global function with example usage: _get_image_saver() and returns: torchvision, None