Method setItemGraphicEl

src/data/SeriesData.ts:1319–1325

* Set graphic element relative to data. It can be set as null

(idx: number, el: Element)

     * Set graphic element relative to data. It can be set as null
     */
    setItemGraphicEl(idx: number, el: Element): void {
        const seriesIndex = this.hostModel && (this.hostModel as any).seriesIndex;

        setCommonECData(seriesIndex, this.dataType, idx, el);

        this._graphicEls[idx] = el;
    }

    getItemGraphicEl(idx: number): Element {
        return this._graphicEls[idx];