// Also called by FrameworkContentElement
        internal static void SynchronizeForceInheritProperties(
            UIElement        uiElement,
            ContentElement   contentElement,
            UIElement3D      uiElement3D,
            DependencyObject parent)
        {
            if(uiElement != null || uiElement3D != null)
            {
                bool parentValue = (bool) parent.GetValue(IsEnabledProperty);
                if(!parentValue)
                {
                    // For Read/Write force-inherited properties, use the standard coersion pattern.
                    //
                    // The IsEnabled property must be coerced false if the parent is false.
                    if (uiElement != null)
                    {
                        uiElement.CoerceValue(IsEnabledProperty);
                    }
                    else
                    {
                        uiElement3D.CoerceValue(IsEnabledProperty);
                    }
                }

                parentValue = (bool) parent.GetValue(IsHitTestVisibleProperty);
                if(!parentValue)
                {
                    // For Read/Write force-inherited properties, use the standard coersion pattern.
                    //
                    // The IsHitTestVisible property must be coerced false if the parent is false.
                    if (uiElement != null)
                    {
                        uiElement.CoerceValue(IsHitTestVisibleProperty);
                    }
                    else
                    {
                        uiElement3D.CoerceValue(IsHitTestVisibleProperty);
                    }
                }

                parentValue = (bool) parent.GetValue(IsVisibleProperty);
                if(parentValue)
                {
                    // For Read-Only force-inherited properties, use a private update method.
                    //
                    // The IsVisible property can only be true if the parent is true.
                    if (uiElement != null)
                    {
                        uiElement.UpdateIsVisibleCache();
                    }
                    else
                    {
                        uiElement3D.UpdateIsVisibleCache();
                    }
                }
            }
            else if(contentElement != null)
            {
                bool parentValue = (bool) parent.GetValue(IsEnabledProperty);
                if(!parentValue)
                {
                    // The IsEnabled property must be coerced false if the parent is false.
                    contentElement.CoerceValue(IsEnabledProperty);
                }
            }
        }