code: function(points, options) {
        if (!points) {
          points = [0, 0, 0, 0];
        }
  
        this.callSuper('initialize', options);
  
        this.set('x1', points[0]);
        this.set('y1', points[1]);
        this.set('x2', points[2]);
        this.set('y2', points[3]);
  
        this._setWidthHeight(options);
      }
docs: Constructor
  @method initialize
  @param {Array} points Array of points
  @param {Object} [options] Options object
  @return {fabric.Line} thisArg