src/vs/editor/standalone/browser/standaloneServices.ts/StandaloneDialogService/confirm
class StandaloneDialogService:	public confirm(confirmation: IConfirmation): Promise<IConfirmationResult> {
		return this.doConfirm(confirmation).then(confirmed => {
			return {
				confirmed,
				checkboxChecked: false // unsupported
			} as IConfirmationResult;
		});
	}