n>
          <div class="features">@<a href="dart-core/Deprecated-class.html">Deprecated</a>(&quot;This property is not implemented. Use getRawOption and &quot; &quot;setRawOption instead.&quot;), read / write</div>
        </section>
        <section class="desc markdown">
          <p>Set or get, the network interface used for outgoing multicast packages.</p>
<p>A value of <code>null</code>indicate that the system chooses the network
interface to use.</p>
<p>By default this value is <code>null</code></p>
