/**
 * Subcapability that allows communication between the dialog and the parent app.
 *
 * @remarks
 * Note that dialog can be invoked from parentless scenarios e.g. Search Message Extensions. The subcapability `parentCommunication` is not supported in such scenarios.
 *
 * @module
 */
import { PostMessageChannel } from '../dialog';
/**
 *  Send message to the parent from dialog
 *
 * @remarks
 * This function is only intended to be called from code running within the dialog. Calling it from outside the dialog will have no effect.
 *
 * @param message - The message to send to the parent
 */
export declare function sendMessageToParentFromDialog(message: any): void;
/**
 *  Send message to the dialog from the parent
 *
 * @param message - The message to send
 */
export declare function sendMessageToDialog(message: any): void;
/**
 * Register a listener that will be triggered when a message is received from the app that opened the dialog.
 *
 * @remarks
 * This function is only intended to be called from code running within the dialog. Calling it from outside the dialog will have no effect.
 *
 * @param listener - The listener that will be triggered.
 */
export declare function registerOnMessageFromParent(listener: PostMessageChannel): void;
/**
 * Checks if dialog.url.parentCommunication capability is supported by the host
 *
 * @returns boolean to represent whether dialog.url.parentCommunication capability is supported
 *
 * @throws Error if {@linkcode app.initialize} has not successfully completed
 */
export declare function isSupported(): boolean;