Bug 126839 [DataBinding] IObservable refactoring
bundles/org.eclipse.jface.databinding/src/org/eclipse/jface/internal/databinding/DataBindingContext.java
IUpdatable result = factory.createUpdatable(null, description,
					thisDatabindingContext);
			if (result != null) {
				return result;
			}
		}
		if (parent != null) {
			return parent
					.doCreateUpdatable(description, thisDatabindingContext);
		}
		throw new BindingException("could not find updatable for " 
				+ description);
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.jface.internal.provisional.databinding.IDataBindingContext#addUpdatableFactory(org.eclipse.jface.internal.provisional.databinding.IUpdatableFactory)
	 */
	public void addUpdatableFactory(IUpdatableFactory updatableFactory) {
		
		
		
		
		factories.add(updatableFactory);
	}
	public void updateTargets() {
		Assert.isTrue(false, "updateTargets is not yet implemented"); 
	}
	public void updateModels() {
		Assert.isTrue(false, "updateModels is not yet implemented");