code: public Attribute getAttribute()
      {
          final Attribute ret;
          if (this.valueSelect == null) {
              ret = this.fromSelect.getMainOneSelect().getAttribute();
          } else {
              ret = this.valueSelect.getAttribute();
          }
          return ret;
      }
docs: Getter method for instance variable {@link #attribute}.
  
  @return value of instance variable {@link #attribute}