code: public void unsubscribeAllResourcesFor(CmsDbContext dbc, String poolName, CmsPrincipal principal)
      throws CmsException {
  
          getSubscriptionDriver().unsubscribeAllResourcesFor(dbc, poolName, principal);
  
      }
docs: Unsubscribes the principal from all resources.<p>
  
  @param dbc the database context
  @param poolName the name of the database pool to use
  @param principal the principal that unsubscribes from all resources
  
  @throws CmsException if something goes wrong