docs: public void selectButton(CmsRadioButton button) {
  
          if (m_selectedButton != button) {
              if (m_selectedButton != null) {
                  m_selectedButton.setChecked(false);
              }
              if (!button.isChecked()) {
                  button.setChecked(true);
              }
              m_selectedButton = button;
              if (m_target != null) {
                  ValueChangeEvent.fire(m_target, button.getName());
              }
              ValueChangeEvent.fire(this, button.getName());
          }
      }