Не получается вытащить из массива

[Predator199]

topicsLibrary Object ( [debugMode:protected] => [post:protected] => classPostForms Object ( 
 [_isMergingPosts:protected] => [can_add_poll] => 1 [max_poll_questions] => 3
[max_poll_choices_per_question] => 20 [can_upload] => 1 
[can_edit_poll] => 1 [poll_total_votes] => 0 [can_set_close_time] => 1 
[can_set_open_time] => 1 [registry:protected] => ipsRegistry Object ( [templateStriping] => Array ( ) ) [DB:protected] => db_driver_mysql Object ( [connect_failed:protected] => [cached_fields:prot

Пытаюсь так достать max_poll_questions, не получается...
$lib_topics -> topicsLibrary -> classPostForms['max_poll_questions']