public function add_child_item(cc_i_item &$item) {
        if (is_null($this->childitems)) {
            $this->childitems = array();
        }
        $this->childitems[$item->identifier] = $item;
    }
public function add_child_item(cc_i_item &$item) {
        if (is_null($this->childitems)) {
            $this->childitems = array();
        }
        $this->childitems[$item->identifier] = $item;
    }
public function add_child_item ( cc_i_item & $ item ) { if ( is_null ( $ this -> childitems ) ) { $ this -> childitems = array ( ) ; } $ this -> childitems [ $ item -> identifier ] = $ item ; }
Add one Child Item

@param cc_i_item $item
Add one Child Item