export declare class EventBus {
    private events;
    private static instance;
    /**
     * Get all registered events.
     */
    static getEvents(): Map<string, CallableFunction>;
    /**
     * Get the number of registered events.
     */
    static getEventsSize(): number;
    /**
     * Get the callback function of a specific event.
     * @param name Event name
     */
    static getEvent(name: string): CallableFunction | undefined;
    /**
     * Check if an event is registered.
     * @param name Event name
     */
    static hasEvent(name: string): boolean;
    /**
     * Delete an event.
     * @param name Event name
     * @returns Whether the event was deleted
     */
    static deleteEvent(name: string): boolean;
    /**
     * Register or overwrite an event.
     * @param name Event name
     * @param callback Callback function
     */
    static setEvent(name: string, callback: CallableFunction): Map<string, CallableFunction>;
    /**
     * Bind an event.
     * @param name Event name
     * @param callback Callback function
     */
    static on(name: string, callback: CallableFunction): Map<string, CallableFunction>;
    /**
     * Trigger an event.
     * @param name Event name
     * @param payload Arguments passed to the callback
     */
    static emit(name: string, ...payload: any[]): any;
    /**
     * Trigger an event once and then remove it.
     * @param name Event name
     * @param payload Arguments passed to the callback
     */
    static once(name: string, ...payload: any[]): any;
    /**
     * Remove one or more events.
     * @param name Event name or array of names
     * @returns Whether all events were removed
     */
    static off(name: string | string[]): boolean;
    /**
     * Get the singleton instance of EventBus.
     */
    static getInstance(): EventBus;
    private static isFunction;
}