code: public void unsubscribeResourceForAll(CmsObject cms, CmsResource resource) throws CmsException {
  
          if (!isEnabled()) {
              throw new CmsRuntimeException(Messages.get().container(Messages.ERR_SUBSCRIPTION_MANAGER_DISABLED_0));
          }
          m_securityManager.unsubscribeResourceForAll(cms.getRequestContext(), getPoolName(), resource);
      }
docs: Unsubscribes all groups and users from the resource.<p>
  
  @param cms the current users context
  @param resource the resource to unsubscribe all groups and users from
  
  @throws CmsException if something goes wrong