originating <a class="el" href="classipc_1_1session_1_1shm_1_1classic_1_1Session__impl.html#ad88d76b7b2a0c78490b74dee6f8a510c" title="See shm::classic::Session_mv counterpart for public description.">Arena</a> in the <code>Blob</code> returned by <a class="el" href="classipc_1_1session_1_1shm_1_1classic_1_1Session__impl.html#a9d970e1fd44cf7932d4160e26a45fa6c" title="See shm::classic::Session_mv counterpart.">borrow_object()</a> and taken by <a class="el" href="classipc_1_1session_1_1shm_1_1classic_1_1Sessio