        <section id="setter">
        
        <section class="multi-line-signature">
          <span class="returntype">void</span>
                    <span class="name ">onCancel=</span>
<span class="signature">(<wbr><span class="parameter" id="onCancel=-param-onCancelHandler"><span class="type-annotation">dynamic</span> <span class="parameter-name">onCancelHandler</span>()</span><wbr>)</span>
                  
</section>
        
                        <section class="summary source-code" id="source">