code: public int getVirtualGroupFlags() {
  
          int flags = I_CmsPrincipal.FLAG_GROUP_VIRTUAL;
          flags += I_CmsPrincipal.FLAG_GROUP_VIRTUAL * 2 * getSystemRoles().indexOf(forOrgUnit(null));
          return flags;
      }
docs: Returns the flags needed for a group to emulate this role.<p>
  
  @return the flags needed for a group to emulate this role