import org.eclipse.jface.preference.IPreferenceStore;
import org.eclipse.jface.util.IPropertyChangeListener;
-import org.eclipse.jface.util.ListenerList;
+// incastrix
+//import org.eclipse.jface.util.ListenerList;
+import org.eclipse.core.runtime.ListenerList;
+
import org.eclipse.jface.util.PropertyChangeEvent;
/**