ndex</code> is by default set to 0. If provided, it must be
an integer in the range <code>[0 .. len]</code>, where <code>len</code> is this string's length.</p>
    </section>
    
    <section class="summary source-code" id="source">
      <h2><span>Implementation</span></h2>
      <pre class="language-dart"><code class="language-dart">String replaceFirstMapped(Pattern from, String replace(Match match),
    [int startIndex = 0]);</code></pre>
    </section>

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