public function applyChangeToMember($empId, \Application\BookingChange $bookingData)
 {
     $this->rewind();
     foreach ($this as $member) {
         if ($member->getId() == $empId) {
             $member->setNewTime($bookingData->getStart(), $bookingData->getEnd());
             $member->setNotes($bookingData->getNotes());
             $member->setEmpId($bookingData->getEmpId());
             break;
         }
     }
 }