export interface Message<T> {
    destination: string;
    content: T;
}
export declare namespace Message {
    function is(value: Message<any> | any): value is Message<any>;
    function send(message: Message<any>, context?: Window): void;
    function send(destination: string, content: any, context?: Window): void;
    function listen(origin: string, handle: (destination: string, content: any) => void, context?: Window): void;
}