function EventEmitter() {
        /**
         * Registered listeners.
         * @type {Object.<string,*>}
         * @private
         */
        this._listeners = {};
      }
/**
       * Constructs a new event emitter instance.
       * @classdesc A minimal event emitter.
       * @memberof util
       * @constructor
       */
Constructs a new event emitter instance.
@classdesc A minimal event emitter.
@memberof util
@constructor
Constructs a new event emitter instance . @classdesc A minimal event emitter . @memberof util @constructor
function EventEmitter() {
        this._listeners = {};
      }
function EventEmitter ( ) { this . _listeners = { } ; }
Constructs a new event emitter instance.
Constructs a new event emitter instance .
/**
         * Registered listeners.
         * @type {Object.<string,*>}
         * @private
         */