ss.html">String</a></span> <span class="parameter-name">to</span>, [</span> <span class="parameter" id="replaceFirst-param-startIndex"><span class="type-annotation"><a href="dart-core/int-class.html">int</a></span> <span class="parameter-name">startIndex</span> = <span class="default-value">0</span></span> ])
            <span class="returntype parameter">&#8594; <a href="dart-core/String-class.html">String</a></span>
          </span>
                  </dt>
        <dd>
          Returns a new string in w