php里的private值调用不到。类 遍历对象，如何取值pathName？

$objects = new R(new D($files));
foreach($objects as $object) {
//$arrFile[] = $object;
dump($object,'$object');die();
}
//输出效果
$object object(SplFileInfo)#4 (2) {
["pathName":"SplFileInfo":private] => string(49) "D:\website\Library\Helper\."
["fileName":"SplFileInfo":private] => string(1) "good.php"
}

取不到不是很正常吗，如果能取到那private的声明不就没意义了。
SplFileInfo应该提供getPathName之类的public方法来获取private $pathName的值。例如
public function getPathName() {
return $this->pathName;

}

支持一下感觉挺不错的