/// <reference path="leaf.d.ts" />
declare namespace Leaf {
    interface EventHandlerInfo {
        owner?: any;
        once?: boolean;
        handler: Function;
    }
    interface EventHandlers {
        [index: string]: EventHandlerInfo[];
    }
    class EventEmitter<E extends string> {
        private events;
        constructor();
        addEventListener(event: E, handler: Function): this;
        on(event: E, handler: Function): this;
        once(event: E, handler: Function): this;
        listenByOnce(who: any, event: E, handler: Function): this;
        listenBy(who: any, event: E, handler: Function): this;
        stopListenBy(who: any, event?: E, handler?: Function): this;
        removeEventListener(event?: E, handler?: Function): this;
        emit(event: E, ...values: any[]): this;
        private getOrCreateEventHandlers(event);
    }
}