&#8594; <a href="dart-core/bool-class.html">bool</a></span>         
        </dt>
        <dd>
          Returns whether this <code>Duration</code> is negative. <a href="dart-core/Duration/isNegative.html">[...]</a>
                  <div class="features">read-only</div>
</dd>
        <dt id="runtimeType" class="property inherited">
          <span class="name"><a href="dart-core/Object/runtimeType.html">runtimeType</a></span>
          <span class="signature">&#8594; <a href="dart-core/Type-class.html">Ty