constructor() {
    /**
     * The asset ID to fetch the tiles key for.
     * @export {string|undefined}
     */
    this.assetId;

    /**
     * The visualization parameters for this layer.
     * @export {!Object|undefined}
     */
    this.visParams;
  }
An object describing FeatureView visualization parameters.
@see ee.data.getFeatureViewTilesKey
@record @struct