Bug 127861 [DataBinding] Mark API provisional
bundles/org.eclipse.jface.databinding/src/org/eclipse/jface/internal/databinding/NestedUpdatableValue.java
private boolean updating=false;
	private IChangeListener innerChangeListener = new IChangeListener() {
		public void handleChange(ChangeEvent changeEvent) {
			if (!updating) {
				fireChangeEvent(changeEvent.getChangeType(), changeEvent
						.getOldValue(), changeEvent.getNewValue());
			}
		}
	};