ass.html">bool</a></span>
        </dt>
        <dd>
          Is true if the session has not been sent to the client yet.
          <div class="features">read-only</div>
</dd>
        <dt id="onTimeout" class="property">
          <span class="name"><a href="dart-io/HttpSession/onTimeout.html">onTimeout</a></span>
          <span class="signature">&#8592; <span class="parameter" id="onTimeout=-param-callback"><span class="type-annotation">void</span> <span class="parameter-name">Function</span>()</span></s