@Override
  public void registerConstantReferences(String className, Collection<Callbacks.ConstantRef> cRefs) {
    final String key = className.replace('.', '/');
    if (!cRefs.isEmpty()) {
      myConstantRefs.put(key, cRefs);
    }
    else {
      myConstantRefs.remove(key);
    }
  }
@Override
  public void registerConstantReferences(String className, Collection<Callbacks.ConstantRef> cRefs)