/// <summary>
 /// Initializes a new instance of the <see cref="InvertedNullableBooleanToVisibilityConverter"/> class.
 /// </summary>
 public InvertedNullableBooleanToVisibilityConverter()
 {
     _nullableBooleanToVisibilityConverter = new NullableBooleanToVisibilityConverter();
 }
 /// <summary>
 /// Initializes a new instance of the <see cref="InvertedNullableBooleanToVisibilityConverter"/> class.
 /// </summary>
 public InvertedNullableBooleanToVisibilityConverter()
 {
     _nullableBooleanToVisibilityConverter = new NullableBooleanToVisibilityConverter ();
 }