componentWillUnmount: function() {
        var listeners = this.windowListeners;

        for (var eventName in listeners) {
            var callbackName = listeners[eventName];
            Events.off(window, eventName, this[callbackName]);
        }
    }
 componentWillUnmount: function() {
     Events.off(window, "onorientationchange" in window ? "orientationchange" : "resize", this._onorientationchange);
 },