code: protected void initGroupObject() {
  
          try {
              // edit an existing group, get the group object from db
              m_group = getCms().readGroup(new CmsUUID(getParamGroupid()));
              setParentGroup(getCms().readGroup(m_group.getParentId()).getName());
          } catch (CmsException e) {
              // should never happen
          }
      }
docs: Initializes the group object.<p>