A member of the :ref:`WdLineSpacing` enumeration indicating how the
        value of :attr:`line_spacing` should be interpreted. Assigning any of
        the :ref:`WdLineSpacing` members :attr:`SINGLE`, :attr:`DOUBLE`, or
        :attr:`ONE_POINT_FIVE` will cause the value of :attr:`line_spacing`
        to be updated to produce the corresponding line spacing.

def line_spacing_rule(self):
        """
        A member of the :ref:`WdLineSpacing` enumeration indicating how the
        value of :attr:`line_spacing` should be interpreted. Assigning any of
        the :ref:`WdLineSpacing` members :attr:`SINGLE`, :attr:`DOUBLE`, or
        :attr:`ONE_POINT_FIVE` will cause the value of :attr:`line_spacing`
        to be updated to produce the corresponding line spacing.
        """
        pPr = self._element.pPr
        if pPr is None:
            return None
        return self._line_spacing_rule(
            pPr.spacing_line, pPr.spacing_lineRule
        )