function Layer(id, dataSet, options) {
            classCallCheck(this, Layer);

            var _this = possibleConstructorReturn(this, (Layer.__proto__ || Object.getPrototypeOf(Layer)).call(this, id, options));

            _this.options_ = options;
            _this.dataSet = dataSet;
            _this._initBaseLayer(options);
            return _this;
        }
MapV for maptalks.js (https://github.com/maptalks/maptalks.js)
@author fuzhenn / https://github.com/fuzhenn