*/
class ApiSetNotificationTimestamp extends ApiBase {
- private $mPageSet;
+ private $mPageSet = null;
public function execute() {
$user = $this->getUser();
* @return ApiPageSet
*/
private function getPageSet() {
- if ( !isset( $this->mPageSet ) ) {
+ if ( $this->mPageSet === null ) {
$this->mPageSet = new ApiPageSet( $this );
}