import { CowWidgetEventListeners } from '@cowprotocol/events';
export declare class IframeCowEventEmitter {
    private contentWindow;
    private eventEmitter;
    private listeners;
    private widgetListener;
    constructor(contentWindow: Window, listeners?: CowWidgetEventListeners);
    stopListeningIframe(): void;
    updateListeners(listeners?: CowWidgetEventListeners): void;
}