import { ISubscribable, SubscriptionChangeEventHandler } from "..";
/**
 * Hides the implementation of the event dispatcher. Will expose methods that
 * are relevent to the event.
 *
 * @export
 * @class DispatcherWrapper
 * @implements {ISubscribable<TEventHandler>}
 * @template TEventHandler The type of event handler.
 */
export declare class DispatcherWrapper<TEventHandler> implements ISubscribable<TEventHandler> {
    private _subscribe;
    private _unsubscribe;
    private _one;
    private _has;
    private _clear;
    private _count;
    private _onSubscriptionChange;
    /**
     * Creates an instance of DispatcherWrapper.
     * @param {ISubscribable<TEventHandler>} dispatcher
     *
     * @memberOf DispatcherWrapper
     */
    constructor(dispatcher: ISubscribable<TEventHandler>);
    /**
     * Triggered when subscriptions are changed (added or removed).
     *
     * @readonly
     * @type {ISubscribable<SubscriptionChangeEventHandler>}
     * @memberOf DispatcherWrapper
     */
    get onSubscriptionChange(): ISubscribable<SubscriptionChangeEventHandler>;
    /**
     * Returns the number of subscriptions.
     *
     * @readonly
     * @type {number}
     * @memberOf DispatcherWrapper
     */
    get count(): number;
    /**
     * Subscribe to the event dispatcher.
     *
     * @param {TEventHandler} fn The event handler that is called when the event is dispatched.
     * @returns {() => void} A function that unsubscribes the event handler from the event.
     *
     * @memberOf DispatcherWrapper
     */
    subscribe(fn: TEventHandler): () => void;
    /**
     * Subscribe to the event dispatcher.
     *
     * @param {TEventHandler} fn The event handler that is called when the event is dispatched.
     * @returns {() => void} A function that unsubscribes the event handler from the event.
     *
     * @memberOf DispatcherWrapper
     */
    sub(fn: TEventHandler): () => void;
    /**
     * Unsubscribe from the event dispatcher.
     *
     * @param {TEventHandler} fn The event handler that is called when the event is dispatched.
     *
     * @memberOf DispatcherWrapper
     */
    unsubscribe(fn: TEventHandler): void;
    /**
     * Unsubscribe from the event dispatcher.
     *
     * @param {TEventHandler} fn The event handler that is called when the event is dispatched.
     *
     * @memberOf DispatcherWrapper
     */
    unsub(fn: TEventHandler): void;
    /**
     * Subscribe once to the event with the specified name.
     *
     * @returns {() => void} A function that unsubscribes the event handler from the event.
     *
     * @memberOf DispatcherWrapper
     */
    one(fn: TEventHandler): () => void;
    /**
     * Checks it the event has a subscription for the specified handler.
     *
     * @param {TEventHandler} fn The event handler that is called when the event is dispatched.
     *
     * @memberOf DispatcherWrapper
     */
    has(fn: TEventHandler): boolean;
    /**
     * Clears all the subscriptions.
     *
     * @memberOf DispatcherWrapper
     */
    clear(): void;
}