/**
  * @return array
  */
 public function toArray()
 {
     $data = ['startDate' => Util::api_date_format($this->startDate), 'endDate' => Util::api_date_format($this->endDate), 'pageSize' => $this->getPageSize(), 'onlyShowLatestEvent' => $this->isOnlyShowLatestEvent()];
     if (count($this->filterEvents) > 0) {
         $data['filterEvents'] = array_unique($this->filterEvents);
     }
     return $data;
 }