code: function ReactWheelHandler(
  onWheel,
      /*boolean*/ handleScrollX,
      /*boolean*/ handleScrollY,
      /*?boolean*/ stopPropagation)
     {
      this.$ReactWheelHandler_animationFrameID = null;
      this.$ReactWheelHandler_deltaX = 0;
      this.$ReactWheelHandler_deltaY = 0;
      this.$ReactWheelHandler_didWheel = this.$ReactWheelHandler_didWheel.bind(this);
      this.$ReactWheelHandler_handleScrollX = handleScrollX;
      this.$ReactWheelHandler_handleScrollY = handleScrollY;
      this.$ReactWheelHandler_stopPropagation = !!stopPropagation;
      this.$ReactWheelHandler_onWheelCallback = onWheel;
      this.onWheel = this.onWheel.bind(this);
    }
docs: onWheel is the callback that will be called with right frame rate if
  any wheel events happened
  onWheel should is to be called with two arguments: deltaX and deltaY in
  this order