declare type Callback = (event: TopicEvent) => void;
export declare type TopicEvent = {
    type: string;
    defaultPrevented?: boolean;
};
export declare class EventTopic {
    private listeners;
    constructor();
    addEventListener(type: string, callback: Callback): void;
    removeEventListener(type: string, callback: Callback): void;
    dispatchEvent(event: TopicEvent): boolean;
}
export {};