protected static function updateConfigFile( $filename )
	{
		if( ( $content = file_get_contents( $filename ) ) === false ) {
			throw new \RuntimeException( sprintf( 'File "%1$s" not found', $filename ) );
		}

		if( self::addAsseticBundle( $content ) === true ) {
			$fs = new Filesystem();
			$fs->dumpFile( $filename, $content );
		}
	}