an class="returntype parameter">&#8594; <a href="dart-core/int-class.html">int</a></span>
          </span>
                  </dt>
        <dd class="inherited">
          Returns the first index of <code>element</code> in this list. <a href="dart-core/List/indexOf.html">[...]</a>
                  <div class="features">inherited</div>
</dd>
        <dt id="indexWhere" class="callable inherited">
          <span class="name"><a href="dart-core/List/indexWhere.html">indexWhere</a></span><span class="signatu