docs: public void removeGroup(String group) {
  
          if (m_fieldsByGroup.get(group) != null) {
              List<I_CmsFormField> fieldsToRemove = new ArrayList<I_CmsFormField>(m_fieldsByGroup.get(group));
              for (I_CmsFormField field : fieldsToRemove) {
                  removeField(field);
              }
          }
          m_fieldsByGroup.removeAll(group);
      }