MyClass::MyAsyncReadMethod(Stream& s) 
{
        Stream *p = &s; // This is a bad, very bad practice!

        vector_containing_callbacks.Add() << [=] {

                       p->GetLine() // !! might eat cats!

                             ?? // How should I proceed? 
                                // Should I use shared_ptr && weak_ptr?
                                // Or A Stream derivative with Ptr && Pte? 
                                // or another alternative?
        };
}