  <div><h1><span class="kind-method">lookup</span> method</h1></div>

    <section class="multi-line-signature">
      <span class="returntype">E</span>
            <span class="name ">lookup</span>
(<wbr><ol class="parameter-list"><li><span class="parameter" id="lookup-param-object"><span class="type-annotation"><a href="../../dart-core/Object-class.html">Object</a></span> <span class="parameter-name">object</span></span></li>
</ol>)
      <div class="features">override</div>
    </section>
    <section cl