def METHOD_NAME(self, args):
    """
    Return SettingSorter instance or None
    If `args` evaluates to True, it is passed to SettingSorter and the
    result is returned.
    If `args` evaluates to False, None is returned.
    """
    if args:
        from ...client import SettingSorter
        return SettingSorter(objects.localcfg.validate('sort.settings', args))