function Empty3DTileContent(tileset, tile) {
  this._tileset = tileset;
  this._tile = tile;

  this.featurePropertiesDirty = false;
}
Represents empty content for tiles in a
{@link https://github.com/CesiumGS/3d-tiles/tree/main/specification|3D Tiles} tileset that
do not have content, e.g., because they are used to optimize hierarchical culling.
<p>
Implements the {@link Cesium3DTileContent} interface.
</p>

@alias Empty3DTileContent
@constructor

@private