<div class="block">Returns the executor for this <code>Service</code>instance.

 The executor is used for all asynchronous invocations that
 require callbacks.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>The <code>java.util.concurrent.Executor</code> to be
         used to invoke a callback.</dd>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/util/concurrent/Executor.html?is-external=true" title="class or 