*/
static void checkGutterTargets(@NotNull final GutterMark renderer,
@NotNull final Function<PsiElement, String> resultValueFunction,
final String... expectedValues) {
final LineMarkerInfo lineMarkerInfo = ((LineMarkerInfo.LineMarkerGutterIconRenderer) renderer).getLineMarkerInfo();
final NavigationGutterIconRenderer navigationHandler = (NavigationGutterIconRenderer) lineMarkerInfo.getNavigationHandler();
assertNotNull(navigationHandler);
final List<PsiElement> targetElements = navigationHandler.getTargetElements();
final Set<String> foundValues = new HashSet<String>();
for (final PsiElement psiElement : targetElements) {
foundValues.add(resultValueFunction.fun(psiElement));
}