private boolean isDeletedByDeleteColumnVersion(ExtendedCell cell) {
    for (ExtendedCell deleteColumnVersion : deleteColumnVersionList) {
      if (
        deleteColumnVersion.getTimestamp() == cell.getTimestamp()
          && (!newVersionBehavior || cell.getSequenceId() < deleteColumnVersion.getSequenceId())
      ) {
        return true;
      }
    }
    return false;
  }
@param dir Directory to create file in.
@return random filename inside passed <code>dir</code>
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/StoreFileWriter.java