BetaOptionaltooltip: string | Observable<string> | UIRawMessage | Observable<UIRawMessage>Optionaltooltip: string | Observable<string> | UIRawMessage | Observable<UIRawMessage>Tell the client to close the message box. Throws FormCloseError if the message box is not open.
Staticcreate
A simple message form UI, 2 buttons and a text body.