getPoints() {
    const flatCoordinates = this.flatCoordinates;
    const layout = this.layout;
    const stride = this.stride;
    /** @type {Array<Point>} */
    const points = [];
    for (let i = 0, ii = flatCoordinates.length; i < ii; i += stride) {
      const point = new Point(flatCoordinates.slice(i, i + stride), layout);
      points.push(point);
    }
    return points;
  }
Return the points of this multipoint.
@return {Array<Point>} Points.
@api