span>form<span class="tsd-signature-symbol">?: </span><span class="tsd-signature-type">any</span><span class="tsd-signature-symbol">; </span><br/><span>    </span>index<span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">number</span><span class="tsd-signature-symbol">; </span><br/><span>    </span>key<span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">string</span><span class="tsd-signature-symbol">; </span><br/><span>    </span>mode<span class="