@abc.abstractmethod<EOL><INDENT>def get_upcoming_events(self, number):<DEDENT>
return<EOL>
Gets the next upcoming events on this calendar.

        :param number: the number of events
        :type number: ``cardinal``
        :return: the returned ``Event`` list
        :rtype: ``osid.calendaring.EventList``
        :raise: ``OperationFailed`` -- unable to complete request
        :raise: ``PermissionDenied`` -- authorization failure

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