public function importPortableElementFile($absolutePath, $relativePath)
    {
        if ($this->isPortableElementAsset($relativePath)) {

            //marked the file as being ok to be imported in the end
            $this->importingFiles[] = $relativePath;

            //@todo remove qti file used by PCI

            return $this->getFileInfo($absolutePath, $relativePath);
        } else {
            throw new \common_Exception('trying to import an asset that is not part of the portable element asset list');
        }
    }