      </span>
                  </dt>
        <dd>
           
                  
</dd>
        <dt id="measure" class="callable">
          <span class="name"><a href="../dart-html/Performance/measure.html">measure</a></span><span class="signature">(<wbr><span class="parameter" id="measure-param-measureName"><span class="type-annotation"><a href="../dart-core/String-class.html">String</a></span> <span class="parameter-name">measureName</span>, </span><wbr><span class="parameter" id="measure-param-startMark