face in java.util.concurrent"><code>Executor</code></a> to handle observer notification</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>an immutable holder of an executor</dd>
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<pre>static&nbsp;<a href="../../../javax/enterprise/event/NotificationOptions.html" title="interface in javax.enterprise.event">NotificationOptions</a>&nbsp;of(<a href="http://docs.or