@abc.abstractmethod<EOL><INDENT>def get_gradebook_columns_by_query(self, gradebook_column_query):<DEDENT>
return<EOL>
Gets a list of gradebook columns matching the given query.

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

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