@Override
  public @Nullable String getNamespace(@NotNull XmlTag context) {
    final DomInvocationHandler handler = DomManagerImpl.getDomManager(myProject).getDomHandler(context);

    if (handler == null) {
      return null;
    }
    return handler.createEvaluatedXmlName(myDescription.getXmlName()).getNamespace(context, handler.getFile());
  }
@Override
  public @Nullable String getNamespace(@NotNull XmlTag context)