public function validatePlugin($oAssetFileFilter) {
        if ($oAssetFileFilter instanceof \AssetsBundle\AssetFile\AssetFileFilter\AssetFileFilterInterface) {
            return;
        }
        throw new \RuntimeException(sprintf(
                'Assets Filter expects an instance of \AssetsBundle\AssetFile\AssetFileFilter\AssetFileFilterInterface, "%s" given', is_object($oAssetFileFilter) ? get_class($oAssetFileFilter) : (is_scalar($oAssetFileFilter) ? $oAssetFileFilter : gettype($oAssetFileFilter))
        ));
    }