@abc.abstractmethod<EOL><INDENT>def order_activity_results(self, activitiesearch_order):<DEDENT>
pass<EOL>
Specify an ordering to the search results.

        :param activitiesearch_order: activity search order
        :type activitiesearch_order: ``osid.learning.ActivitySearchOrder``
        :raise: ``NullArgument`` -- ``activitiesearch_order`` is ``null``
        :raise: ``Unsupported`` -- ``activitiesearch_order`` is not of this service

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