php protected object

hello guys i need help..

PHP Code:

---

$group = $ts3Server->serverGroupGetById($value['sgid']);

foreach($group->privilegeKeyList()  as $k => $v)
{
           if(!in_array($k, $items))
                  {
                          $items[$k]['token'] = $k;
                          $items[$k]['token_type'] = $v['token_type'];
                          $items[$k]['token_id1'] = $v['token_id1'];
                          $items[$k]['token_id2'] = $v['token_id2'];
                          $items[$k]['token_created'] = $v['token_created'];
                          $items[$k]['desc'] = $v['token_description'];
                   }
} 


---

but in array token_desciption is "protected" can't get it ....

PHP Code:

---

Array (
[FynAH89SYf91WLwV6+s158I3CxuqDVayjXFHWFV7] =>
Array (
[token] => FynAH89SYf91WLwV6+58I3CxuqDVayjXFHWFV7
[token_type] => 0
[token_id1] => 636
[token_id2] => 0
[token_created] => 1455477219
[desc] => TeamSpeak3_Helper_String Object ( [string:protected] => test [position:protected] => 0 )
)
) 


---

How can do to get it to non protected :) Thank's for help

php protected object