itle="Internal, non-movable pImpl-lite implementation of Server_session_mv class template.">Server_session_impl</a> class/object pair, A and B. In this case &ndash; which is somewhat unusual (relative to most internal <code><a class="el" href="classipc_1_1session_1_1Session.html" title="A documentation-only concept defining the local side of an IPC conversation (session) with another en...">Session</a></code> algorithms) but in a good, simplifying way &ndash; it does not matter which is A and which is B. So