the search at index <code class="prettyprint lang-dart">startIndex</code> to 0.
Returns -1 if <code class="prettyprint lang-dart">element</code> is not found.
              </dd>
              <dt id="lastWhere" class="callable">
                  <span class="name ">lastWhere</span><span class="signature">(<wbr><span class="parameter" id="lastWhere-param-test"><span class="type-annotation">bool</span> <span class="parameter-name">test</span>(<span class="parameter" id="test-param-element"><span class="type