docs: public String getAttributes() {
          StringBuilder str = new StringBuilder();
  
          if (getSid() != null)
              str.append(" sid='").append(getSid()).append('\'');
  
          if (getPass() != null)
              str.append(" pass='").append(getPass()).append('\'');
  
          if (getPortA() != -1)
              str.append(" porta='").append(getPortA()).append('\'');
  
          if (getPortB() != -1)
              str.append(" portb='").append(getPortB()).append('\'');
  
          if (getHostA() != null)
              str.append(" hosta='").append(getHostA()).append('\'');
  
          if (getHostB() != null)
              str.append(" hostb='").append(getHostB()).append('\'');
  
          return str.toString();
      }