erface in java.lang">String</a> GROUP_NULL_VALUE</pre>
<div class="block">Represents a string value for</div>
<dl><dt><span class="strong">See Also:</span></dt><dd><a href="../../../../../../../constant-values.html#org.apache.solr.search.grouping.distributed.requestfactory.TopGroupsShardRequestFactory.GROUP_NULL_VALUE">Constant Field Values</a></dd></dl>
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