46f8d86">m_opposing_session_done</a></td></tr>
<tr class="memdesc:ab1548d77913d3e99e4f30e1dd46f8d86"><td class="mdescLeft">&#160;</td><td class="mdescRight">A promise whose fulfillment is a necessary and sufficient condition for <a class="el" href="classipc_1_1session_1_1Session__base_1_1Graceful__finisher.html#af441f45ce1ed7b890c3ab77d959f8830" title="The reason Graceful_finisher exists, this method must be called at the start of *_session_impl dtor; ...">on_dtor_start()</a> returning (letting <code><a cla