r><span class="parameter" id="contains-param-element"><span class="type-annotation"><a href="../dart-core/Object-class.html">Object</a></span> <span class="parameter-name">element</span></span><wbr>)
            <span class="returntype parameter">&#8594; <a href="../dart-core/bool-class.html">bool</a></span>
          </span>
                  </dt>
        <dd class="inherited">
          Returns true if the collection contains an element equal to <code>element</code>. <a href="../dart-collection/ListMixin