code: def get_audio_backend() -> Optional[str]:
      """Get the name of the current global backend
  
      Returns:
          str or None:
              If dispatcher mode is enabled, returns ``None`` otherwise,
              the name of current backend or ``None`` (no backend is set).
      """
      return None
  
imports: from typing import List, Optional
  from torchaudio._internal.module_utils import deprecated
  from .None import utils
  from .common import AudioMetaData
label_desc: Use image node_id 2 for calling a global function with example usage: get_audio_backend() and returns: None