/**
 * Represents an event with associated data.
 */
export type Event = {
    /**
     * The data associated with the event. The type of data is unknown.
     */
    data: unknown;
};
/**
 * Event emitter class that allows registering event listeners and emitting events.
 */
export declare class EventEmitter {
    /**
     * A map of event keys to their respective callback functions.
     * @private
     */
    private events;
    /**
     * Initializes a new instance of the EventEmitter class.
     */
    constructor();
    /**
     * Registers a listener for a specific event key.
     *
     * @param {string} keyEvent - The key of the event to listen for.
     * @param {(param: Event) => void} callback - The callback function to be invoked when the event is emitted.
     */
    listener(keyEvent: string, callback: (param: Event) => void): void;
    /**
     * Emits an event, invoking the corresponding listener with the provided parameter.
     *
     * @param {string} keyEvent - The key of the event to emit.
     * @param {Event} param - The parameter to pass to the event's callback function.
     */
    emit(keyEvent: string, param: Event): void;
}