export declare class MessagePortPolyfill implements MessagePort {
    onmessage: any;
    onmessageerror: any;
    otherPort: MessagePortPolyfill;
    private onmessageListeners;
    constructor();
    dispatchEvent(event: any): boolean;
    postMessage(message: any): void;
    addEventListener(type: any, listener: any): void;
    removeEventListener(type: any, listener: any): void;
    start(): void;
    close(): void;
}
export declare class MessageChannelPolyfill implements MessageChannel {
    port1: MessagePortPolyfill;
    port2: MessagePortPolyfill;
    constructor();
}
export declare function applyPolyfill(): void;