src/vs/workbench/api/browser/mainThreadMessageService.ts/MainThreadMessageService/$showMessage
class MainThreadMessageService:	$showMessage(severity: Severity, message: string, options: MainThreadMessageOptions, commands: { title: string; isCloseAffordance: boolean; handle: number; }[]): Promise<number | undefined> {
		if (options.modal) {
			return this._showModalMessage(severity, message, options.detail, commands, options.useCustom);
		} else {
			return this._showMessage(severity, message, commands, options.extension);
		}
	}