@Override
  public Scan setLoadColumnFamiliesOnDemand(boolean value) {
    super.setLoadColumnFamiliesOnDemand(value);
    return this;
  }
Returns true when the constructor of this scan understands that the results they will see may
only represent a partial portion of a row. The entire row would be retrieved by subsequent
calls to {@link ResultScanner#next()}
hbase-client/src/main/java/org/apache/hadoop/hbase/client/Scan.java