lass="type-annotation">T</span> <span class="parameter-name">event</span></span>)</span>)
            <span class="returntype parameter">&#8594; <a href="dart-async/Stream-class.html">Stream</a><span class="signature">&lt;<wbr><span class="type-parameter">E</span>&gt;</span></span>
          </span>
                  </dt>
        <dd class="inherited">
          Creates a new stream with each data event of this stream asynchronously
mapped to a new event. <a href="dart-async/Stream/asyncMap.html">[...]</a>