com.google.gwt.resources.client
Annotation Type CssResource.Shared

@Documented
@Retention(value=RUNTIME)
@Target(value=TYPE)
public static @interface CssResource.Shared

Indicates that the String accessor methods defined in a CssResource will return the same values across all implementations of that type.

This is an example of "stateful" class selectors being used:

@Shared
 interface FocusCss extends CssResource {
   String focused();
   String unfocused();
 }
 
 interface PanelCss extends CssResource, FocusCss {
   String widget();
 }
 
 interface InputCss extends CssResource, FocusCss {
   String widget();
 }
 
 input.css:
 *.focused .widget {border: thin solid blue;}
 
 Application.java:
 myPanel.add(myInputWidget);
 myPanel.addStyleName(instanceOfPanelCss.focused());
 

The effect of inheriting an Shared interface can be replicated by use use of the CssResource.Import annotation (e.g. .FocusCss-focused .widget), however the use of state-bearing descendant selectors is common enough to warrant an easier use-case.