Multibinder extension not working with Roboguice 3

[Pawel Tschudnowsky]

The version 3.0 of mutlibinder was working with roboguice 2.0 just fine. The version 4 (to match Guice 4) doesn't work with Roboguice 3 anymore.
I get Multibinder is not initialized Exception upon start which is cause by Multibinder check

private boolean isInitialized() {
  return binder == null;
}

So, if binder is not null, Exception is thrown because according to Multibinder-Description, it is set during configuration 
and must be set to null after it. And here we come to the point, the method initialize

/**
 * Invoked by Guice at Injector-creation time to prepare providers for each
 * element in this set. At this time the set's size is known, but its
 * contents are only evaluated when get() is invoked.
 */
@Toolable @Inject void initialize(Injector injector) {
  List<Binding<T>> bindings = Lists.newArrayList();
  Set<Indexer.IndexedBinding> index = Sets.newHashSet();
  Indexer indexer = new Indexer(injector);
  List<Dependency<?>> dependencies = Lists.newArrayList();
  for (Binding<?> entry : injector.findBindingsByType(elementType)) {
    if (keyMatches(entry.getKey())) {
      @SuppressWarnings("unchecked") // protected by findBindingsByType()
      Binding<T> binding = (Binding<T>) entry;
      if (index.add(binding.acceptTargetVisitor(indexer))) {
        bindings.add(binding);
        dependencies.add(Dependency.get(binding.getKey()));
      }
    }
  }

  this.bindings = ImmutableList.copyOf(bindings);
  this.dependencies = ImmutableSet.copyOf(dependencies);
  this.permitDuplicates = permitsDuplicates(injector);
  this.binder = null;
}

as you see from method description, it should be called from guice itself. and since Roboguice uses own version of guice 
(or did I confuse something?) my question is, is it possible that roboguice version of guice is not calling this method 
leaving Multibinder "unconfigured"?