/// <summary>
 /// Unregister the specified renderer.
 /// </summary>
 /// <returns>The unregister.</returns>
 /// <param name="renderer">Renderer.</param>
 internal static void Unregister(ReactViewRenderer renderer)
 {
     _renderers.Remove(renderer);
 }
 /// <summary>
 /// Register the specified renderer.
 /// </summary>
 /// <returns>The register.</returns>
 /// <param name="renderer">Renderer.</param>
 internal static void Register(ReactViewRenderer renderer)
 {
     _renderers.Add(renderer);
 }