Support for decorator design pattern: RenderKit(s)

Spec. "11.4.6 Delegating Implementation Support" - "The runtime must support the decorator design pattern .. for .. RenderKit". This is especially true for HTML_BASIC, following example should work:

faces-config.xml
<render-kit>
<render-kit-class>com.foo.render.RenderKitImpl</render-kit-class>
<render-kit-id>HTML_BASIC</render-kit-id>
</render-kit>

RenderKitImpl:
class RenderKitImpl extends RenderKit implements FacesWrapper<RenderKit> {
public RenderKitImpl(RenderKit wrapped)

{ super(); this.wrapped = wrapped; }

// method delegation here ...
}