rited">
          <span class="name"><a href="dart-async/Stream/drain.html">drain</a></span><span class="signature">&lt;<wbr><span class="type-parameter">E</span>&gt;</span><span class="signature">(<wbr>[<span class="parameter" id="drain-param-futureValue"><span class="type-annotation">E</span> <span class="parameter-name">futureValue</span></span> ])
            <span class="returntype parameter">&#8594; <a href="dart-async/Future-class.html">Future</a><span class="signature">&lt;<wbr><span class="type-par