/*!
 * Copyright (c) Microsoft. All rights reserved.
 */
export declare type EventListener<T> = (data: T) => void;
/**
 * @export
 * @interface EventHook
 * @template T
 */
export interface EventHook<T> {
    /**
     * Subscribe a listener to this event.
     *
     * @param {EventListener<T>} listener
     */
    subscribe(listener: EventListener<T>): void;
    /**
     * Unsubscribe a listener from this event.
     *
     * @param {EventListener<T>} listener
     */
    unsubscribe(listener: EventListener<T>): void;
    /**
     * Remove all listeners from this event.
     */
    unsubscribeAll(): void;
}
export declare class EventHook<T> implements EventHook<T> {
    private sender;
    protected listeners: Array<EventListener<T>>;
    constructor(sender: any);
    dispatch(data: T): void;
}