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

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