docs: public boolean userInGroup(CmsRequestContext context, String username, String groupname) throws CmsException {
  
          CmsDbContext dbc = m_dbContextFactory.getDbContext(context);
          boolean result = false;
          try {
              result = m_driverManager.userInGroup(
                  dbc,
                  CmsOrganizationalUnit.removeLeadingSeparator(username),
                  CmsOrganizationalUnit.removeLeadingSeparator(groupname),
                  false);
          } catch (Exception e) {
              dbc.report(null, Messages.get().container(Messages.ERR_USER_IN_GROUP_2, username, groupname), e);
          } finally {
              dbc.clear();
          }
          return result;
      }