export declare class EventDescriptor<T extends string> {
    private eventDispatcher;
    eventName: T;
    callback: Function;
    condition?: Function;
    constructor(eventDispatcher: EventDispatcher<T>, eventName: T, callback: Function, condition?: Function);
    off(): void;
}
export declare class ParentEvent<T extends string> {
    eventName: T;
    data?: any;
    constructor(eventName?: T, data?: any);
}
export declare class EventDispatcher<T extends string> {
    protected events: Array<EventDescriptor<T>>;
    constructor();
    on(eventName: T, callback1?: Function, callback2?: Function): any;
    once(eventName: T, callback1?: Function, callback2?: Function): any;
    offEvent(eventDescriptor: EventDescriptor<T>): EventDispatcher<T>;
    off(eventName?: T, callback?: Function): this;
    fire(eventName: T | Array<T>, data?: ParentEvent<T>): this;
}