@abc.abstractmethod<EOL><INDENT>def get_days(self):<DEDENT>
return<EOL>
Gets the days of the month in order of the calendar.

        For a variable day calendar, all defined days are returned. If
        there are no "days" in this time system then this value may be
        zero. If there are no "months" defined then the number of days
        applies to the entire year.

        :return: the days
        :rtype: ``osid.locale.CalendarUnit``


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