XF\Entity\Post Object
(
    [_uniqueEntityId:XF\Mvc\Entity\Entity:private] => 9
    [rootClass:protected] => XF\Entity\Post
    [_useReplaceInto:protected] => 
    [_newValues:protected] => Array
        (
        )

    [_values:protected] => Array
        (
            [post_id] => 1262
            [thread_id] => 288
            [user_id] => 4
            [username] => chagold
            [post_date] => 1584230524
            [message] => s
            [ip_id] => 4327
            [message_state] => visible
            [attach_count] => 0
            [position] => 0
            [likes] => 0
            [like_users] => a:0:{}
            [warning_id] => 0
            [warning_message] => 
            [last_edit_date] => 0
            [last_edit_user_id] => 0
            [edit_count] => 0
            [embed_metadata] => []
        )

    [_relations:protected] => Array
        (
            [Thread] => BoardOfProfessionals\XF\Entity\Thread Object
                (
                    [_uniqueEntityId:XF\Mvc\Entity\Entity:private] => 8
                    [rootClass:protected] => XF\Entity\Thread
                    [_useReplaceInto:protected] => 
                    [_newValues:protected] => Array
                        (
                        )

                    [_values:protected] => Array
                        (
                            [thread_id] => 288
                            [node_id] => 141
                            [title] => s
                            [reply_count] => 0
                            [view_count] => 0
                            [user_id] => 4
                            [username] => chagold
                            [post_date] => 1584230524
                            [sticky] => 0
                            [discussion_state] => visible
                            [discussion_open] => 1
                            [discussion_type] => 
                            [first_post_id] => 1262
                            [first_post_likes] => 0
                            [last_post_date] => 1584230524
                            [last_post_id] => 1262
                            [last_post_user_id] => 4
                            [last_post_username] => chagold
                            [prefix_id] => 0
                            [tags] => a:0:{}
                            [custom_fields] => a:0:{}
                            [demo_portal_featured] => 0
                            [BoardOfProfessionals_featured] => 1
                            [TagsToBoardOfProfessionals] => הנהלת חשבונות
                        )

       

איך אני ניגש לערך node_id שנמצא מתחת _relations:protected
?