   <dt id="toRawHandle" class="callable">
          <span class="name"><a href="dart-ui/CallbackHandle/toRawHandle.html">toRawHandle</a></span><span class="signature">(<wbr>)
            <span class="returntype parameter">&#8594; <a href="dart-core/int-class.html">int</a></span>
          </span>
                  </dt>
        <dd>
          Get the raw callback handle to pass over a <code>MethodChannel</code> or <a href="dart-isolate/SendPort-class.html">SendPort</a>
(to pass to another <a href="dart-isol