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<h4>readColGroup</h4>
<pre class="methodSignature">static&nbsp;<a href="AColGroup.html" title="class in org.apache.sysds.runtime.compress.colgroup">AColGroup</a>&nbsp;readColGroup&#8203;(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/io/DataInput.html?is-external=true" title="class or interface in java.io" class="externalLink">DataInput</a>&nbsp;in,
 