Bug 263413 [DataBinding] Widget<Value|List>Property and Viewer<Value|Set|List>Property should be public
The base Widget*Property and Viewer*Property perform some standard stuff like defaulting the realm to the display realm of the widget, and wrapping the observable in an ISWTObservable or IViewerObservable decorator. In addition, WidgetValueProperty implements listeners using SWT's untyped listener API. We should make these classes public so that downstream projects like Nebula can consume them.
bundles/org.eclipse.jface.databinding/src/org/eclipse/jface/internal/databinding/swt/WidgetIntValueProperty.java
WidgetIntValueProperty() {
		super();
	}
	WidgetIntValueProperty(int event) {
		super(event);
	}
	WidgetIntValueProperty(int[] events) {
		super(events);
	}
	public Object getValueType() {
		return Integer.TYPE;
	}
	protected Object doGetValue(Object source) {
		return new Integer(doGetIntValue(source));
	}
	protected void doSetValue(Object source, Object value) {
		doSetIntValue(source, ((Integer) value).intValue());
	}
	abstract int doGetIntValue(Object source);
	abstract void doSetIntValue(Object source, int intValue);
}