def GetVolumeIdentifiers(self, volume_system):
    volume_identifiers = []
    for volume in volume_system.volumes:
      volume_identifier = getattr(volume, u'identifier', None)
      if volume_identifier:
        volume_identifiers.append(volume_identifier)

    return sorted(volume_identifiers)
Run Popen(*args) and return its output as a byte string.
dataset/ETHPy150Open log2timeline/dfvfs/dfvfs/helpers/source_scanner.py/SourceScanner.GetVolumeIdentifiers--crossover with--dataset/ETHPy150Open chromium/web-page-replay/platformsettings.py/_BasePlatformSettings._check_output