m</a><span class="signature">&lt;<wbr><span class="type-parameter">S</span>&gt;</span></span>
          </span>
                  </dt>
        <dd class="inherited">
          Transforms each element of this stream into a sequence of elements. <a href="dart-async/Stream/expand.html">[...]</a>
                  <div class="features">inherited</div>
</dd>
        <dt id="firstWhere" class="callable inherited">
          <span class="name"><a href="dart-async/Stream/firstWhere.html">firstWhere</a></span><span