 let's say A is us and B is the opposing guy.</p>
<p >Also, for now, assume these are just the vanilla ones: <a class="el" href="classipc_1_1session_1_1Client__session__impl.html" title="Internal, non-movable pImpl-lite implementation of Client_session_mv class template.">session::Client_session_impl</a> and <a class="el" href="classipc_1_1session_1_1Server__session__impl.html" title="Internal, non-movable pImpl-lite implementation of Server_session_mv class template.">session::Server_session_impl</a>; not 