declare const eventHandlers: unique symbol;
declare const nativeAliases: unique symbol;
type Handler = EventListenerOrEventListenerObject;
type EventTable = Record<string, Handler | undefined> & {
    [nativeAliases]?: Set<string>;
};
type EventElement = EventTarget & {
    [eventHandlers]?: EventTable;
};
export declare const removeEvent: (element: EventElement, eventKey: string, handler: Handler) => void;
export declare const updateEvent: (element: EventElement, eventKey: string, newHandler: Handler | undefined, oldHandler?: Handler) => void;
export {};