/// <summary>
 /// Adds the given entity to this layer.
 /// </summary>
 /// <param name="layer">The layer instance.</param>
 /// <param name="entity">The entity to add.</param>
 private static void AddInternal(LayerTableRecord layer, Entity entity)
 {
     Helpers.WriteWrap(entity, () => entity.LayerId = layer.ObjectId);
 }