group named <code>name</code>, or
<code>null</code> if no string was matched by that capture group as part of
this match.</p>
<p>The <code>name</code> must be the name of a named capture group in the regular
expression creating this match (that is, the name must be in
<a href="dart-core/RegExpMatch/groupNames.html">groupNames</a>).</p>
    </section>
    
    <section class="summary source-code" id="source">
      <h2><span>Implementation</span></h2>
      <pre class="language-dart"><code class="language-da