@abc.abstractmethod<EOL><INDENT>def get_xoxxoseconds(self):<DEDENT>
return<EOL>
Gets the number of xoxxoseconds of the yoctosecond 0-999.

        A xoxxosecond is one octillionth of a second. We're going with
        Rudy Rucker here.

        :return: the xoxxoseconds of the yoctosecond
        :rtype: ``cardinal``


        *compliance: mandatory -- This method must be implemented.*