docs: protected Collection<String> getUserRoles(PortletRequest request) {
          ArrayList<String> portletUserRolesList = new ArrayList<String>();
  
          for (String role : portletMappableRoles) {
              if (request.isUserInRole(role)) {
                  portletUserRolesList.add(role);
              }
          }
  
          return portletUserRolesList;
      }