PortalService service = null;
try {
service = (PortalService)this.manager.lookup(PortalService.ROLE);
final String layoutKey = service.getDefaultLayoutKey();
service.removeAttribute(KEY_PREFIX + layoutKey);
} catch (ServiceException e) {
// this should never happen
throw new CascadingRuntimeException("Unable to lookup portal service.", e);
} finally {
this.manager.release(service);