import { Service } from './metadata';
import { MessageBox, Qualifier } from '@scion/workbench-application-platform.api';
/**
 * Displays message boxes to the user.
 */
export declare class MessageBoxService implements Service {
    /**
     * Displays the specified message to the user.
     *
     * By default, and if no qualifier is specified, a built-in messagebox pops up.
     * To display a custom message box, provide the qualifier as expected by the
     * respective {IntentHandler} registered in the host application.
     *
     * @returns a promise that resolves to the action key which the user pressed to confirm the message.
     */
    open(messageBox: MessageBox, qualifier?: Qualifier): Promise<string>;
    onDestroy(): void;
}