code: @Deprecated
      @Override
      public SQLTransaction beginTransaction(IsolationLevel isolationLevel, boolean forUpdateOnly) {
          return super.beginTransaction(isolationLevel, forUpdateOnly);
      }
docs: The connection opened in the transaction will be automatically closed after the transaction is committed or rolled back.
  DON'T close it again by calling the close method.
  
  @param isolationLevel
  @param forUpdateOnly
  @return
  @deprecated