ther event has been received and
can be read as <a href="dart-async/StreamIterator/current.html">current</a>.
Completing with <code>false</code> means that the stream iteration is done and
no further events will ever be available.
The future may complete with an error, if the stream produces an error,
which also ends iteration.</p>
<p>The function must not be called again until the future returned by a
previous call is completed.</p>
    </section>
    
    <section class="summary source-code" id="source">
