docs: @Override
      public void close() {
          namedParamSqlCache.clear();
          namedParamIndexPropCache.clear();
          clearStatementCache();
          if (useConnection != null) {
              try {
                  useConnection.close();
              } catch (SQLException e) {
                  LOG.finest("Caught exception closing connection: " + e.getMessage());
              }
          }
      }