>Null safety</a>
</h1></div>

    <section class="multi-line-signature">
      

<span class="returntype">void</span>
<span class="name ">addErrorHandler</span>(<wbr><ol class="parameter-list"><li><span class="parameter" id="addErrorHandler-param-errorHandler"><span class="type-annotation"><a href="https://api.flutter.dev/flutter/dart-core/Object-class.html">Object</a></span> <span class="parameter-name">errorHandler</span></span></li>
</ol>)

      

    </section>
    
<section class="desc markdown">
  <p