function EffectLine(lineData, idx, seriesScope) {
	        graphic.Group.call(this);

	        this.add(this.createLine(lineData, idx, seriesScope));

	        this._updateEffectSymbol(lineData, idx);
	    }
@constructor
@extends {module:echarts/chart/helper/EffectLine}
@alias {module:echarts/chart/helper/Polyline}