 a field or query facet.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>expressionName</code> - the name of the expression</dd>
<dt><span class="strong">Returns:</span></dt><dd>String String representation of pivot value</dd></dl>
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<h4>getNumStatsCollectors</h4>
<pre>public&nbsp;long&nbsp;getNumStatsCollectors()</pre>
<div class="block">Used for JMX stats collecting. Counts the nu