hich the first occurrence of <code>from</code> in this string
is replaced with <code>to</code>, starting from <code>startIndex</code>: <a href="dart-core/String/replaceFirst.html">[...]</a>
                  
</dd>
        <dt id="replaceFirstMapped" class="callable">
          <span class="name"><a href="dart-core/String/replaceFirstMapped.html">replaceFirstMapped</a></span><span class="signature">(<wbr><span class="parameter" id="replaceFirstMapped-param-from"><span class="type-annotation"><a href="dart-c