n></span>)
            <span class="returntype parameter">&#8594; <a href="dart-async/Future-class.html">Future</a><span class="signature">&lt;<a href="dart-core/bool-class.html">bool</a>&gt;</span></span>
          </span>
        </dt>
        <dd class="inherited">
          Returns whether <code>needle</code> occurs in the elements provided by this stream. <a href="dart-async/Stream/contains.html">[...]</a>
          <div class="features">inherited</div>
</dd>
        <dt id="destroy" class="callable in