>
      <span class="returntype"><a href="dart-collection/Queue-class.html">Queue</a><span class="signature">&lt;<wbr><span class="type-parameter">R</span>&gt;</span></span>
            <span class="name ">cast</span>
&lt;<wbr><span class="type-parameter">R</span>&gt;(<wbr>)
      <div class="features">override</div>
    </section>
    <section class="desc markdown">
      <p>Provides a view of this queue as a queue of <code>R</code> instances, if necessary.</p>
<p>If this queue contains only instances of <