20Definitions.html#/c:SDLNotificationConstants.h@T@SDLRPCButtonNotificationHandler">SDLRPCButtonNotificationHandler</a></span> <span class="n">_Nonnull</span> <span class="n">handler</span><span class="p">;</span></code></pre>

  
  <h4>Swift</h4>
  <pre class="highlight swift"><code><span class="k">var</span> <span class="nv">handler</span><span class="p">:</span> <span class="kt"><a href="../Type%20Definitions.html#/c:SDLNotificationConstants.h@T@SDLRPCButtonNotificationHandler">SDLRPCButtonNotificationHa