ode>factor</code> and returns the result
as a new Duration object. <a href="dart-core/Duration/operator_multiply.html">[...]</a>
                  
</dd>
        <dt id="operator +" class="callable">
          <span class="name"><a href="dart-core/Duration/operator_plus.html">operator +</a></span><span class="signature">(<wbr><span class="parameter" id="+-param-other"><span class="type-annotation"><a href="dart-core/Duration-class.html">Duration</a></span> <span class="parameter-name">other</span></span>)
 