* @return LogicObject
   */
  public static LogicObject getRange(LogicObject relation) {
    if (Surrogate.subtypeOfP(Stella_Object.safePrimaryType(relation), Logic.SGT_LOGIC_NAMED_DESCRIPTION)) {
      { NamedDescription relation000 = ((NamedDescription)(relation));

        return (PLI.getNthDomain(relation000, 1));
      }
    }
    else {
      return (null);
    }
  }