Hiding variadic template implementation

I have some 3rdParty library with a method like this:

bool Invoke(const char* method, Value* args, size_t nargs)

It takes an array of its inner type (convertible to any primitive c++ types) and arg count as its inner params. In my code, I wrote some generalized helper to avoid manual creation and type convertion for each invoke:

template<class ... Args>
bool WrappedValue::Invoke(const char* method, Args&& ... args)
{
    3rdParty::Value values[] = 
    {
        3rdParty::Value(std::forward<Args>(args))...
    }

    return m_value.Invoke(method, values, sizeof ... (Args));
}

It works just fine, but now I should have 3rdParty code defined in my header files and lib connected directly to my main project.

Is it possible to hide implementation details and usage of such this 3rd party library? (Use some kind of pimple idiom or proxy object for 3rdParty::Value ). I know that it's not possible to use virtual template methods in c++ to create a proxy or simply move template implementation to .cpp, so I am totally stuck with this problem.

Will be grateful for any help)