" class="externalLink">Future</a>&lt;int[]&gt;&gt;</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#countNNZColumnsFuture(org.apache.sysds.runtime.matrix.data.MatrixBlock,int,java.util.concurrent.ExecutorService)">countNNZColumnsFuture</a></span>&#8203;(<a href="MatrixBlock.html" title="class in org.apache.sysds.runtime.matrix.data">MatrixBlock</a>&nbsp;in,
                     int&nbsp;k,
                     <a href="https://docs.oracle.com/en/java/javase/11/docs/