/**
 * Utils for calling methods via postMessage
 */
export declare const FM_POST_MESSAGE_REQUEST = "fm-post-message-request";
export declare const FM_POST_MESSAGE_RESPONSE = "fm-post-message-response";
export type PostMessageMethodCallParams = {
    targetWindow: Window;
    methodName: string;
    params?: Object[];
    timeout?: number;
};
export declare function callMethodOnWindow({ targetWindow, methodName, params, timeout }: PostMessageMethodCallParams): Promise<any>;
export declare function registerPostMessageMethod(methodName: string, method: (...args: any[]) => Promise<any>): void;
export declare function installPostMessageMethodCall(): void;
export declare function uninstallPostMessageMethodCall(): void;
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