Error</span></span> })
            <span class="returntype parameter">&#8594; <a href="dart-async/StreamSubscription-class.html">StreamSubscription</a><span class="signature">&lt;<a href="dart-core/List-class.html">List</a><span class="signature">&lt;<a href="dart-core/int-class.html">int</a>&gt;</span>&gt;</span></span>
          </span>
        </dt>
        <dd class="inherited">
          Adds a subscription to this stream. <a href="dart-async/Stream/listen.html">[...]</a>
          <div class="features