public function isPermittedDimension($iWidth, $iHeight): bool
    {
        if (Factory::property('allowDangerousImageTransformation', 'nails/module-cdn')) {
            return true;
        } else {
            $sDimension = $iWidth . 'x' . $iHeight;
            return in_array($sDimension, $this->aPermittedDimensions);
        }
    }