</h1></div>

    <section class="multi-line-signature">
      <span class="returntype"><a href="dart-core/Duration-class.html">Duration</a></span>
            <span class="name ">operator unary-</span>
(<wbr>)
      
    </section>
    <section class="desc markdown">
      <p>Returns a new <code>Duration</code> representing this <code>Duration</code> negated.</p>
<p>The returned <code>Duration</code> has the same length as this one, but will have the
opposite sign of this one.</p>
    </section>
    
    <s