class in hydra.ext.com.microsoft.kusto.kql">UnionKind</a>&gt; kind</pre>
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<pre>public final&nbsp;hydra.util.Opt&lt;<a href="ColumnName.html" title="class in hydra.ext.com.microsoft.kusto.kql">ColumnName</a>&gt; withSource</pre>
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<pre>public final&nbsp;hydra.util.Opt&lt;java.lang.Boolean&gt; 