  <p>Creates a new <a href="../../p2plib/ExceptionUnknownRoute-class.html">ExceptionUnknownRoute</a> instance.</p>
<p><a href="../../p2plib/ExceptionBase/message.html">message</a> An optional message describing the unknown route.</p>
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<section class="summary source-code" id="source">
  <h2><span>Implementation</span></h2>
  <pre class="language-dart"><code class="language-dart">const ExceptionUnknownRoute([super.message]);</code></pre>
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