def get_assets_by_query(self, asset_query=None):
return<EOL>
Gets a list of ``Assets`` matching the given asset query.

        :param asset_query: the asset query
        :type asset_query: ``osid.repository.AssetQuery``
        :return: the returned ``AssetList``
        :rtype: ``osid.repository.AssetList``
        :raise: ``NullArgument`` -- ``asset_query`` is ``null``
        :raise: ``OperationFailed`` -- unable to complete request
        :raise: ``PermissionDenied`` -- authorization failure
        :raise: ``Unsupported`` -- the ``asset_query`` is not of this service

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