writeFeaturesText(features, options) {
    if (features.length == 1) {
      return this.writeFeatureText(features[0], options);
    }
    const geometries = [];
    for (let i = 0, ii = features.length; i < ii; ++i) {
      geometries.push(features[i].getGeometry());
    }
    const collection = new GeometryCollection(geometries);
    return this.writeGeometryText(collection, options);
  }
@param {Array<import("../Feature.js").default>} features Features.
@param {import("./Feature.js").WriteOptions} [options] Write options.
@protected
@return {string} Text.
@override