code: function(paths, options) {
  
        options = options || { };
        this.paths = paths || [ ];
  
        for (var i = this.paths.length; i--; ) {
          this.paths[i].group = this;
        }
  
        this.setOptions(options);
        this.setCoords();
  
        if (options.sourcePath) {
          this.setSourcePath(options.sourcePath);
        }
      }
docs: Constructor
  @method initialize
  @param {Array} paths
  @param {Object} [options] Options object
  @return {fabric.PathGroup} thisArg