-long-">reservoirDataset</a></span>(long&nbsp;nRows)</code>
<div class="block">Return a reducer that produces a probabilistically sampled dataset of at most nRows len.</div>
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<td class="colFirst"><code>static java.lang.Object</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../tech/v3/dataset/Reductions.html#reservoirStats-java.lang.Object-long-java.lang.Object-">reservoirStats</a></span>(java.lang.Object&nbsp;colname,
              