></pre>

  
  <h4>Swift</h4>
  <pre class="highlight swift"><code><span class="nf">init</span><span class="p">(</span><span class="nv">handler</span><span class="p">:</span> <span class="kt"><a href="../Type%20Definitions.html#/c:SDLNotificationConstants.h@T@SDLRPCButtonNotificationHandler">SDLRPCButtonNotificationHandler</a></span><span class="p">?</span> <span class="o">=</span> <span class="kc">nil</span><span class="p">)</span></code></pre>

  
  
  <h4>Parameters</h4>
  <dl>
      <dt>handler</dt>
    