How to add Separator in ContextMenu when Binding

[cornerbowlsoftware]

I have a collection of menu item view models which work great. When I add a null value to my collection, I want a Separator to display instead of my custom template. In WPF this is handled with a style trigger. How can I do this in Avalonia?

Style:

	<Style Selector="MenuItem" x:DataType="lib:MenuItemViewModel">
		<Setter Property="Header" Value="{Binding Text}"/>
		<Setter Property="Command" Value="{Binding Command}"/>
		<Setter Property="InputGesture" Value="{Binding InputGestureText, Converter={StaticResource StringToKeyGestureConverter}}"/>
		<Setter Property="Icon" Value="{Binding PathIcon, Converter={StaticResource PathToIconConverter}}"/>
	</Style>

[cornerbowlsoftware]

I was able to finally get the separator to display by setting the bound Text value to "-" as documented.