Binding a ref-qualified function with nanobind

What is the appropriate nanobind syntax to expose the instance method below?

struct Foo {
  int &value() & {
    return v;
  };
  int v;
};

With pybind, one could use static_cast with Foo::* syntax to cast the function pointer to the appropriate type, like so:

nb::class_<Foo>(m, "Foo").def("value", static_cast<int &(Foo::*)() &>(&Foo::value));

but with nanobind, I get this error:

...third_party/nanobind/include/nanobind/nb_class.h:567:28: error: no matching
function for call to 'cpp_function_def<Foo>(int& (Foo::*)() &, nanobind::scope,
nanobind::name, nanobind::is_method)'
    567 |         cpp_function_def<T>((detail::forward_t<Func>) f, scope(*this),
        |         ~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    568 |                             name(name_), is_method(), extra...);
        |                             ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Do I need some sort of wrapper class with a non-ref-qualified method?