code: function rotateTo(degree) {
      var imageData = this.imageData;
  
  
      degree = Number(degree);
  
      if (isNumber(degree) && this.viewed && !this.played && this.options.rotatable) {
        imageData.rotate = degree;
        this.renderImage();
      }
  
      return this;
    }
docs: Rotate the image to an absolute degree.
  @param {number} degree - The rotate degree.
  @returns {Viewer} this