title: Allow class access to single private member
body: <p>I have a class A which has a private method called a(). I have also a class B which needs to access a() (but just B should have access to a(), thats why a() is private). I could now use a friend specifier but that would make other private methods of A (lets call them b() and c()) also available to B and I dont want that behaviour.</p>
  
  <p>Is there a way to make just a() of A accessable to B?</p>