public byte[] getColumnQualifierBytes() {
    if (null == columnQualifierBytes) {
      columnQualifierBytes = columnQualifier.getBytes(Charsets.UTF_8);
    }

    return columnQualifierBytes;
  }
Cached bytes for the columnQualifier. Modifications to the bytes will affect those stored in
this ColumnMapping -- such modifications are highly recommended against.

@return UTF8 formatted bytes
accumulo-handler/src/java/org/apache/hadoop/hive/accumulo/columns/HiveAccumuloColumnMapping.java