/**
  * Lists all scheduled(!) sessions.
  *
  * @return string
  */
 public function listScheduledAction()
 {
     $this->addTableCacheTags();
     return json_encode($this->scheduledSessionRepository->findAll()->toArray());
 }
 /**
  * Update session
  *
  * @param \TYPO3\Sessions\Domain\Model\ScheduledSession $session
  * @validate $session \TYPO3\Sessions\Domain\Validator\SpeakerCollisionValidator
  * @return string
  */
 public function updateSessionAction($session)
 {
     $this->sessionRepository->update($session);
     return 'success';
 }