import { EventCallback, EventMap, EventMapKeys, IWidgetEvents } from '../types';
export declare class WidgetEvents implements IWidgetEvents {
    protected destroyed: boolean;
    private eventCallbacks;
    onEvent<K extends EventMapKeys>(eventName: K, callback: EventCallback<EventMap[K]>): void;
    offEvent<K extends EventMapKeys>(eventName: K, callback?: EventCallback<EventMap[K]>): void;
    hasSubscribed(eventName: EventMapKeys): boolean;
    /**
     * Called when the widget is destroyed
     * Remove all the events
     */
    protected destroy(): void;
    protected triggerEvent<K extends EventMapKeys>(eventName: K, event: EventMap[K]): void;
    private getCallbacks;
}