t/Reductions.html#distinctUInt32-java.lang.Object-">distinctUInt32</a></span>(java.lang.Object&nbsp;colname)</code>
<div class="block">Returns a distinct reducer that produces a roaringbitmap of distinct values.</div>
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<td class="colFirst"><code>static java.util.Map</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../tech/v3/dataset/Reductions.html#groupByColumnsAgg-java.lang.Iterable-java.lang.Object-java.util.Map-java.util.Map-">gro