Method getSelectedMapKey

src/component/visualMap/PiecewiseModel.ts:254–257

* @public

(piece: InnerVisualPiece)

     * @public
     */
    getSelectedMapKey(piece: InnerVisualPiece) {
        return this._mode === 'categories'
            ? piece.value + '' : piece.index + '';
    }

    /**
     * @public