docs: public void disableInput(String disabledReason) {
  
          m_disabledReason = disabledReason;
          for (I_CmsFormField field : m_form.getFields().values()) {
              field.getWidget().setEnabled(false);
          }
          m_urlNameField.getWidget().setEnabled(false);
          CmsNotification.get().send(Type.WARNING, m_disabledReason);
      }