protected processMessageCancel ( Sabre\VObject\ITip\Message $itipMessage, Sabre\VObject\Component\VCalendar $existingObject = null ) : Sabre\VObject\Component\VCalendar | null | ||
$itipMessage | Sabre\VObject\ITip\Message | |
$existingObject | Sabre\VObject\Component\VCalendar | |
return | Sabre\VObject\Component\VCalendar | null |