4; <a href="../dart-core/List-class.html">List</a><span class="signature">&lt;<wbr><span class="type-parameter"><a href="../dart-core/String-class.html">String</a></span>&gt;</span></span>         
        </dt>
        <dd>
           
                  <div class="features">read-only</div>
</dd>
        <dt id="userChoice" class="property">
          <span class="name"><a href="../dart-html/BeforeInstallPromptEvent/userChoice.html">userChoice</a></span>
          <span class="signature">&#8594; <a href=".