"FooRef get_foo_ref() const noexcept;";
"void update_foo(const Foo & foo) noexcept;";
"void update_mut_foo(Foo & foo) noexcept;";

r#"template<bool OWN_DATA>
    inline FooRef TestReferencesWrapper<OWN_DATA>::get_foo_ref() const noexcept
    {

        const FooOpaque * ret = TestReferences_get_foo_ref(this->self_);
        return FooRef{ static_cast<const FooOpaque *>(ret) };
    }"#;

r#"template<bool OWN_DATA>
    inline void TestReferencesWrapper<OWN_DATA>::update_foo(const Foo & foo) noexcept
    {

        TestReferences_update_foo(this->self_, static_cast<const FooOpaque *>(foo));
    }"#;

r#"template<bool OWN_DATA>
    inline void TestReferencesWrapper<OWN_DATA>::update_mut_foo(Foo & foo) noexcept
    {

        TestReferences_update_mut_foo(this->self_, static_cast<FooOpaque *>(foo));
    }"#;

"const FooOpaque * TestReferences_get_foo_ref(const TestReferencesOpaque * const self);";
"void TestReferences_update_foo(TestReferencesOpaque * const self, const FooOpaque * foo);";
"void TestReferences_update_mut_foo(TestReferencesOpaque * const self, FooOpaque * foo);";