@abc.abstractmethod<EOL><INDENT>def get_schedules_by_query(self, schedule_query):<DEDENT>
return<EOL>
Gets a list of ``Schedules`` matching the given schedle query.

        :param schedule_query: the schedule query
        :type schedule_query: ``osid.calendaring.ScheduleQuery``
        :return: the returned ``ScheduleList``
        :rtype: ``osid.calendaring.ScheduleList``
        :raise: ``NullArgument`` -- ``schedule_query`` is ``null``
        :raise: ``OperationFailed`` -- unable to complete request
        :raise: ``PermissionDenied`` -- authorization failure
        :raise: ``Unsupported`` -- ``schedule_query`` is not of this service

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