public function get_child_ids() {
        $childids = array();
        foreach ($this->items as $child) {
           $childids[] = $child->id;
        }
        return $childids;
    }
public function get_child_ids() {
        $childids = array();
        foreach ($this->items as $child) {
           $childids[] = $child->id;
        }
        return $childids;
    }
public function get_child_ids ( ) { $ childids = array ( ) ; foreach ( $ this -> items as $ child ) { $ childids [ ] = $ child -> id ; } return $ childids ; }
Returns an array of ids of child items.

@return   array peer ids
Returns an array of ids of child items .