public function set( \Aimeos\MShop\Common\Item\Iface $item )
	{
		$code = $item->getCode();

		if( !isset( $this->attributes[$code] ) || !is_array( $this->attributes[$code] ) ) {
			$this->attributes[$code] = [];
		}

		$this->attributes[$code][$item->getType()] = $item;
	}