code: public void initialize(CmsObject cms) throws CmsRoleViolationException {
  
          OpenCms.getRoleManager().checkRole(cms, CmsRole.ROOT_ADMIN);
          m_frozen = true;
      }
docs: Initializes this subscription manager with the OpenCms system configuration.<p>
  
  @param cms an OpenCms context object that must have been initialized with "Admin" permissions
  
  @throws CmsRoleViolationException in case the given opencms object does not have <code>{@link CmsRole#ROOT_ADMIN}</code> permissions