docs: public void setDriverClassName(String driverClassName) {
  
          if (driverClassName.equals(JDBCConnectionPoolDataSource.driver)) {
              return;
          }
  
          /** @todo: Use a HSQLDB RuntimeException subclass */
          throw new RuntimeException("This class only supports JDBC driver '"
                                     + JDBCConnectionPoolDataSource.driver
                                     + "'");
      }