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<h3>Constructor Detail</h3>
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<h4>UnionItemsSketch</h4>
<pre>public&nbsp;UnionItemsSketch(int&nbsp;k,
                        <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Comparator.html?is-external=true" title="class or interface in java.util">Comparator</a>&lt;<a href="../../../../../org/apache/datasketches/pig/quanti