@classmethod
def as_tuple(cls):
    """
        Render up a tuple of LSQUO, RSQUO, LDQUO, RDQUO, with
        the ordering of L and R versions of the single and double
        quotes depending on whether we're in LTR or RTL mode.
        The default/unknown setting is to assume LTR, since there
        are many more LTR languages than RTL.
        """
    if cls.direction is None or cls.direction == 'LTR':
        return cls.SSQUO, cls.ESQUO, cls.SDQUO, cls.EDQUO
    else:
        return cls.ESQUO, cls.SSQUO, cls.EDQUO, cls.SDQUO
