       <section class="desc markdown">
          <p>Gets the map of parameters.</p>
<p>This map cannot be modified. Invoking any operation which would
modify the map will throw <a href="../../dart-core/UnsupportedError-class.html">UnsupportedError</a>.</p>
        </section>
                <section class="summary source-code" id="source">
          <h2><span>Implementation</span></h2>
          <pre class="language-dart"><code class="language-dart">Map&lt;String, String&gt; get parameters;</code></pre>
   