export default class EventBus<EventTypes> {
    private handlers;
    /**
     * Subscribe to an event
     */
    subscribe<E extends keyof EventTypes>(eventType: E, callback: (data: EventTypes[E]) => void): () => void;
    /**
     * Subscribe to an event once
     */
    once<E extends keyof EventTypes>(eventType: E, callback: (data: EventTypes[E]) => void): () => void;
    /**
     * Internal method to add an event handler
     */
    private addHandler;
    publish<E extends keyof EventTypes>(eventType: E, data?: EventTypes[E]): void;
    clear(): void;
    clearEvent<E extends keyof EventTypes>(eventType: E): void;
}