public function getTrackCreateOptions()
    {
        return [
            0 => $this->_('Do nothing'),
            4 => $this->_('Create new on minimum start date difference'),
            3 => $this->_('Create always (unless the appointment already assigned)'),
            2 => $this->_('Create new on minimum end date difference'),
            5 => $this->_('Create new when all surveys have been completed'),
            1 => $this->_('Create new when all surveys have been completed and on minimum end date'),
            ];
    }