code: protected I_CmsQueryFragment createCoreCondition(TableAlias users) {
  
          return new CmsSimpleQueryFragment(users.column(colFlags()) + " <= " + I_CmsPrincipal.FLAG_CORE_LIMIT);
      }
docs: Creates a core user check condition.<p>
  
  @param users the user table alias
  
  @return the resulting SQL expression