docs: def check_format(format, subtype=None, endian=None):
      """Check if the combination of format/subtype/endian is valid.
  
      Examples
      --------
      >>> import soundfile as sf
      >>> sf.check_format('WAV', 'PCM_24')
      True
      >>> sf.check_format('FLAC', 'VORBIS')
      False
  
      """
      try:
          return bool(_format_int(format, subtype, endian))
      except (ValueError, TypeError):
          return False