static VisibleRowDefinition()
 {
     HeightProperty.AddOwner(typeof(VisibleRowDefinition),
                             new FrameworkPropertyMetadata(HeightProperty.DefaultMetadata.DefaultValue, OnHeightChanged));
     MinHeightProperty.AddOwner(typeof(VisibleRowDefinition),
                                new FrameworkPropertyMetadata(MinHeightProperty.DefaultMetadata.DefaultValue, OnMinHeightChanged));
     MaxHeightProperty.AddOwner(typeof(VisibleRowDefinition),
                                new FrameworkPropertyMetadata(MaxHeightProperty.DefaultMetadata.DefaultValue, OnMaxHeightChanged));
 }