code: function (options) {
          KmlFeature.call(this, options);
  
          this.isFeature = true;
  
          this.resolvedFile = null;
          this.displayed = false;
          this.isDownloading = false;
      }
docs: Constructs an KmlNetworkLink. Applications usually don't call this constructor. It is called by {@link KmlFile}
  as objects from Kml file are read. This object is already concrete implementation.
  @alias KmlNetworkLink
  @classdesc Contains the data associated with NetworkLink node.
  @param options {Object}
  @param options.objectNode {Node} Node representing NetworkLink
  @constructor
  @throws {ArgumentError} If the node is null or undefined.
  @see https://developers.google.com/kml/documentation/kmlreference#networklink
  @augments KmlFeature