
 if the given handler is processing a message until it is no longer in use.</div>
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<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>handler</code> - the handler to be removed.</dd>
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<h4>getProtocolVersion</h4>
<pre><a href="http://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;getProtocolVersion()<