@abc.abstractmethod<EOL><INDENT>def get_gradebooks_by_query(self, gradebook_query):<DEDENT>
return<EOL>
Gets a list of ``Gradebook`` objects matching the given gradebook query.

        :param gradebook_query: the gradebook query
        :type gradebook_query: ``osid.grading.GradebookQuery``
        :return: the returned ``GradebookList``
        :rtype: ``osid.grading.GradebookList``
        :raise: ``NullArgument`` -- ``gradebook_query`` is ``null``
        :raise: ``OperationFailed`` -- unable to complete request
        :raise: ``PermissionDenied`` -- authorization failure
        :raise: ``Unsupported`` -- ``gradebook_query`` is not of this service

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