Bug 314685 EModelService's findElements(MUIElement, String, Class<T>, List<String>) method can return duplicates
I'm getting two editors in the returned list that's pointing at the same thing. The returned collection is a List and not a Set but this feels wrong.
tests/org.eclipse.e4.ui.tests/src/org/eclipse/e4/ui/tests/application/EModelServiceFindTest.java
private IEclipseContext applicationContext;
	MApplication app = null;
	@Override
	protected void setUp() throws Exception {
		applicationContext = E4Application.createDefaultContext();
		super.setUp();
	}
	@Override
	protected void tearDown() throws Exception {
		super.tearDown();
		if (applicationContext instanceof IDisposable) {
			((IDisposable) applicationContext).dispose();
		}
	}
	private MApplication createApplication() {
		MApplication app = ApplicationFactoryImpl.eINSTANCE.createApplication();