code>, exclusive. <a href="dart-core/String/substring.html">[...]</a>
                  
</dd>
        <dt id="toLowerCase" class="callable">
          <span class="name"><a href="dart-core/String/toLowerCase.html">toLowerCase</a></span><span class="signature">(<wbr>)
            <span class="returntype parameter">&#8594; <a href="dart-core/String-class.html">String</a></span>
          </span>
                  </dt>
        <dd>
          Converts all characters in this string to lower case.
If the string