5 * Every database object that supports polls has to implement this interface.
7 * @author Matthias Schmidt
8 * @copyright 2001-2019 WoltLab GmbH
9 * @license GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
10 * @package WoltLabSuite\Core\Data
13 interface IPollContainer
extends IIDObject
, IPollObject
{
15 * Returns the id of the poll that belongs to this object or `null` if there is no such poll.
17 * @return null|integer
19 public function getPollID();