Bug 300012 [CommonNavigator] CNF test improvements
Various improvements and corrections.
tests/org.eclipse.ui.tests.navigator/src/org/eclipse/ui/tests/navigator/m12/M2ContentProvider.java
public void getPipelinedChildren(Object aParent, Set currentChildren) {
		List newElements = new ArrayList();
		for (Iterator it = currentChildren.iterator(); it.hasNext();) {
			Object child = it.next();
			Object newChild = M2Core.getModelObject(child);
			if (newChild != null) {
				it.remove();
				newElements.add(newChild);
			}
		}