Method add

src/component/dataZoom/DataZoomModel.ts:139–145

(axisCmptIdx: ComponentModel['componentIndex'])

    indexMap: boolean[] = [];

    add(axisCmptIdx: ComponentModel['componentIndex']): void {
        // Remove duplication.
        if (!this.indexMap[axisCmptIdx]) {
            this.indexList.push(axisCmptIdx);
            this.indexMap[axisCmptIdx] = true;
        }
    }
}
export type DataZoomTargetAxisInfoMap = HashMap<DataZoomAxisInfo, DataZoomAxisDimension>;