code: public void println() throws IOException
      {
          if(this._listener!= null &&  !checkIfCalledFromWLonError()){
              
              _outHelper.write_NonBlocking(CRLF, 0, 2);
          }
          else {
              this.write(CRLF, 0, 2);
          }
  
      }
docs: /*
  @see javax.servlet.ServletOutputStream#println()