export interface Handler<E extends Record<string, (...args: Parameters<E[keyof E]>) => ReturnType<E[keyof E]>>, K extends keyof E> {
    event: K;
    once: boolean;
    handler: (...args: Parameters<E[K]>) => void;
}
/**
 * The Event class is responsible to provide an API to subscribe new handlers,
 * and triggers them whenever is necessary
 */
declare class Event<E extends Record<string, (...args: any) => ReturnType<E[keyof E]>>> {
    /**
     * An array that contains subscribed handler functions
     */
    private handlers;
    /**
     * A number that behaves as a counter and used as an id for new handlers
     */
    private count;
    constructor();
    /**
     * Triggers handler functions of a corresponding event
     * @param event - Event name
     * @param args - Event corresponding arguments
     * @public
     * @returns void
     */
    trigger<K extends keyof E & string>(event: K, ...args: Parameters<E[K]>): void;
    /**
     * Subscribe new handler
     * @param event - Event name
     * @param handler - Handler function
     * @public
     * @returns number
     */
    subscribe<K extends keyof E & string>(event: K, handler: (...args: Parameters<E[K]>) => ReturnType<E[K]>): number;
    /**
     * Subscribe new handler which triggers only once
     * @param event - Event name
     * @param handler - Handler function
     * @public
     * @returns number
     */
    subscribeOnce<K extends keyof E & string>(event: K, handler: (...args: Parameters<E[K]>) => ReturnType<E[K]>): number;
    /**
     * Unsubscribe handler from handlers by id
     * @param id - Handler id
     * @public
     * @returns void
     */
    unsubscribe(id: number): void;
}
export default Event;