function Cesium3DTileContent() {
  /**
   * Gets or sets if any feature's property changed.  Used to
   * optimized applying a style when a feature's property changed.
   * <p>
   * This is used to implement the <code>Cesium3DTileContent</code> interface, but is
   * not part of the public Cesium API.
   * </p>
   *
   * @type {boolean}
   *
   * @private
   */
  this.featurePropertiesDirty = false;
}
The content of a tile in a {@link Cesium3DTileset}.
<p>
Derived classes of this interface provide access to individual features in the tile.
Access derived objects through {@link Cesium3DTile#content}.
</p>
<p>
This type describes an interface and is not intended to be instantiated directly.
</p>

@alias Cesium3DTileContent
@constructor