Bug 265878 [DataBinding] Compile errors ("never used locally") in tests and examples
using I20090217-2200.
tests/org.eclipse.jface.tests.databinding/src/org/eclipse/core/tests/databinding/observable/AbstractObservableTest.java
private boolean stale;
		public ObservableStub() {
			this(Realm.getDefault());
		}
		/**
		 * @param realm
		 */
		public ObservableStub(Realm realm) {
			super(realm);
		}
		private boolean firstListenerAdded;
		private boolean lastListenerRemoved;
		protected Object doGetValue() {
			return null;
		}
		public Object getValueType() {
			return null;
		}
		protected void fireStale() {
			super.fireStale();