With class...
With class... is used to
filter window elements and apply properties based on their class.
Theme property filter XML code:
<StyleSheet xmlns="http://querix.com">
<WithClassFilter>
<StyleSheet />
</WithClassFilter>
</StyleSheet>
Possible values:
one of the list of predefined Lycia classes
a custom (user-defined) class
Associated ui methods:
SetClassNames →
GetClassNames →
Influence and behavior:
With class.. filter allows applying properties to a certain class of elements.
To apply a property to a class of elements, you need:
Step 1. Apply a certain class to the element using classNames, Apply class..., or setClassNames.
Step 2. Set the class name as a value for the 
At runtime, the property will be applied only to the objects belonging to the specified class.
Here you can see how the properties applied with a With class filter change the runtime appearance of a toolbar button:
