" id="supportsSession-param-options"><span class="type-annotation"><a href="dart-core/Map-class.html">Map</a></span> <span class="parameter-name">options</span></span> ])
            <span class="returntype parameter">&#8594; <a href="dart-async/Future-class.html">Future</a></span>
          </span>
                  </dt>
        <dd>
          
                  
</dd>
        <dt id="addEventListener" class="callable inherited">
          <span class="name"><a href="dart-html/EventTarget/addEventListener