'Return the line spacing rule value calculated from the combination of
*line* and *lineRule*. Returns special members of the
:ref:`WdLineSpacing` enumeration when line spacing is single, double,
or 1.5 lines.'

@staticmethod
def _line_spacing_rule(line, lineRule):

    if (lineRule == WD_LINE_SPACING.MULTIPLE):
        if (line == Twips(240)):
            return WD_LINE_SPACING.SINGLE
        if (line == Twips(360)):
            return WD_LINE_SPACING.ONE_POINT_FIVE
        if (line == Twips(480)):
            return WD_LINE_SPACING.DOUBLE
    return lineRule
