/**
 * Expose `Emitter`.
 */
/**
 * Initialize a new `Emitter`.
 *
 * @api public
 */
declare function Emitter(obj: any): any;
/**
 * Mixin the emitter properties.
 *
 * @param {Object} obj
 * @return {Object}
 * @api private
 */
declare function mixin(obj: any): any;