docs: public synchronized RowReader getRowReader()
      {
          if (m_rowReader == null)
          {
              Configurator configurator = OjbConfigurator.getInstance();
              Configuration config = configurator.getConfigurationFor(null);
              Class rrClass = config.getClass("RowReaderDefaultClass", RowReaderDefaultImpl.class);
  
              setRowReader(rrClass.getName());
          }
          return m_rowReader;
      }