throws XMLConfigurationException {
// forward to every component
int count = fComponents.size();
for (int i = 0; i < count; i++) {
XMLComponent c = (XMLComponent) fComponents.get(i);
c.setFeature(featureId, state);
}
// save state if noone "objects"
super.setFeature(featureId, state);
} // setFeature(String,boolean)