e ">retainWhere</span><span class="signature">(<wbr><span class="parameter" id="retainWhere-param-test"><span class="type-annotation">bool</span> <span class="parameter-name">test</span>(<span class="parameter" id="test-param-element"><span class="type-annotation">E</span> <span class="parameter-name">element</span></span>)</span>)
                      &#8594;
                      <span class="returntype">void</span>
                  </span>
              </dt>
              <dd>
                  <div>
