ram-element"><span class="type-annotation"><a href="dart-core/Object-class.html">Object</a></span> <span class="parameter-name">element</span></span>)
      <div class="features">override</div>
    </section>
    <section class="desc markdown">
      <p>If an object equal to <code>object</code> is in the set, return it.</p>
<p>Checks whether <code>object</code> is in the set, like <a href="dart-collection/SetMixin/contains.html">contains</a>, and if so,
returns the object in the set, otherwise returns <code