The EMU equivalent of the centipoints value in
        `./a:spcBef/a:spcPts/@val`.

def space_before(self):
        """
        The EMU equivalent of the centipoints value in
        `./a:spcBef/a:spcPts/@val`.
        """
        spcBef = self.spcBef
        if spcBef is None:
            return None
        spcPts = spcBef.spcPts
        if spcPts is None:
            return None
        return spcPts.val