def AddVSSProcessingOptions(self, argument_group):
    """Adds the VSS processing options to the argument group.

    Args:
      argument_group (argparse._ArgumentGroup): argparse argument group.
    """
    argument_group.add_argument(
        '--no_vss', '--no-vss', dest='no_vss', action='store_true',
        default=False, help=(
            'Do not scan for Volume Shadow Snapshots (VSS). This means that '
            'Volume Shadow Snapshots (VSS) are not processed.'))

    argument_group.add_argument(
        '--vss_only', '--vss-only', dest='vss_only', action='store_true',
        default=False, help=(
            'Do not process the current volume if Volume Shadow Snapshots '
            '(VSS) have been selected.'))

    argument_group.add_argument(
        '--vss_stores', '--vss-stores', dest='vss_stores', action='store',
        type=str, default=None, help=(
            'Define Volume Shadow Snapshots (VSS) (or stores that need to be '
            'processed. A range of stores can be defined as: "3..5". '
            'Multiple stores can be defined as: "1,3,5" (a list of comma '
            'separated values). Ranges and lists can also be combined as: '
            '"1,3..5". The first store is 1. All stores can be defined as: '
            '"all".'))
Adds the VSS processing options to the argument group.

    Args:
      argument_group (argparse._ArgumentGroup): argparse argument group.