docs: public void setMonth(String monthStr) {
  
          final Month month = Month.valueOf(monthStr);
          if ((m_model.getMonth() == null) || !m_model.getMonth().equals(monthStr)) {
              removeExceptionsOnChange(new Command() {
  
                  public void execute() {
  
                      m_model.setMonth(month);
                      onValueChange();
  
                  }
              });
          }
      }