SWIG skipping C++ “access declared ” methods due to %rename% rule

I'm using SWIG to generate Java bindings for my C++ library. The
library in question follows the snake case naming convention (e.g.
My_class::my_method) , which is converted to Java camel case
convention (e.g. MyClass::myMethod) via a set of %rename rules.

So let's say I have a single header with two interfaces defined:

###################
    class IBase_interface {
    public:
       virtual void ok() = 0;

        virtual void not_ok() = 0;
    };

######

    /**
    * Note that this is a private inheritance so swig will ignore everything
    */
    class Derived : private IBase_interface {
    public:
      /**
       * The idea is to expose only wanted methods manually here via
    C++03 access declarations
       */
       using IBase_interface::ok;
       using IBase_interface::not_ok;
    };
###################

If my interface file looked like this:

###################
%module test

%include "Test.h"
###################

I would end up with a properly generated Derived.java which would
contain both of methods inherited from IBase_interface

However, if I introduced a naming rule to the interface file by adding
the following line before the include:

      %rename("%(lctitle)s", %$isfunction) "";

the generated Derived.java would contain only the ok method while
not_ok would be skipped (because it was renamed to camel case, and
thus the using IBase_interface::not_ok stopped having any effect).

The official documentation (
http://www.swig.org/Doc1.3/SWIGPlus.html#SWIGPlus_nn35 @ 6.25) seem to
explain the issue in question: "Resolving ambiguity in overloading may
prevent declarations from being imported by using"

Is there a way around this limitation ?