private function ParentItem()
    {
        $this->parent = $this->GetTreeItem('parent');
        return $this->parent->Exists() ? $this->parent : null;
    }
private function ParentItem()
    {
        $this->parent = $this->GetTreeItem('parent');
        return $this->parent->Exists() ? $this->parent : null;
    }
private function ParentItem ( ) { $ this -> parent = $ this -> GetTreeItem ( 'parent' ) ; return $ this -> parent -> Exists ( ) ? $ this -> parent : null ; }
Gets the parent tree item
@return TableObject Returns either the related page or the layout content
Gets the parent tree item