m-subscription"><span class="type-annotation"><a href="dart-async/StreamSubscription-class.html">StreamSubscription</a><span class="signature">&lt;<wbr><span class="type-parameter">T</span>&gt;</span></span> <span class="parameter-name">subscription</span></span>)</span> })
      
    </section>
    <section class="desc markdown">
      <p>Returns a multi-subscription stream that produces the same events as this.</p>
<p>The returned stream will subscribe to this stream when its first
subscriber is added, an