internal static FrameworkElement GetExpandSite(Expander expander)
{
if (expander is null)
{
return(null);
}
var expandSite = GetExpandSiteControl(expander);
if (expandSite is null)
{
expander.ApplyTemplate();
expandSite = expander.Template?.FindName("ExpandSite", expander) as FrameworkElement;
SetExpandSiteControl(expander, expandSite);
}
return(expandSite);
}
