ameter" id="rawIndex=-param-rawIndex"><span class="type-annotation"><a href="../../dart-core/int-class.html">int</a></span> <span class="parameter-name">rawIndex</span></span><wbr>)</span>
                  
</section>
        
                <section class="desc markdown">
          <p>Resets the iterator to the rune at the specified index of the string.</p>
<p>Setting a negative <code>rawIndex</code>, or one greater than or equal to
<code>string.length</code>,
is an error. So is setting it in the middle 