Method makeElOption

src/component/axisPointer/BaseAxisPointer.ts:248–256

* add {pointer, label, graphicKey} to elOption * @protected

(
        elOption: AxisPointerElementOptions,
        value: AxisValue,
        axisModel: AxisBaseModel,
        axisPointerModel: AxisPointerModel,
        api: ExtensionAPI
    )

     * @protected
     */
    makeElOption(
        elOption: AxisPointerElementOptions,
        value: AxisValue,
        axisModel: AxisBaseModel,
        axisPointerModel: AxisPointerModel,
        api: ExtensionAPI
    ) {
        // Should be implemented by sub-class.
    }

    /**
     * @protected