@Override
  public void beforeShipped() {
    if (columnCell != null) {
      this.columnCell = KeyValueUtil.toNewKeyCell(this.columnCell);
    }
  }
We can never know a-priori if we are done, so always return false.
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/querymatcher/ScanWildcardColumnTracker.java