/// <summary>
/// Determines whether the specified view model type is registered.
/// </summary>
/// <param name="uiVisualizerService">The UI visualizer service.</param>
/// <param name="viewModelType">Type of the view model.</param>
/// <returns><c>true</c> if the specified view model type is registered; otherwise, <c>false</c>.</returns>
/// <exception cref="ArgumentNullException">The <paramref name="viewModelType" /> is <c>null</c>.</exception>
public static bool IsRegistered(this IUIVisualizerService uiVisualizerService, Type viewModelType)
{
Argument.IsNotNull("viewModelType", viewModelType);
return(uiVisualizerService.IsRegistered(viewModelType.FullName));
}