docs: public static <T1 extends Serializable, T2 extends Serializable, T3 extends Serializable,
        T4 extends Serializable, T5 extends Serializable, T6 extends Serializable> Sext<T1, T2, T3, T4, T5, T6> next(final T1 t1 , final T2 t2 , final T3 t3 ,
                                                                                                                     final T4 t4 , final T5 t5 , final T6 t6) {
      return new Sext<>(t1 , t2 , t3 , t4 , t5 , t6);
    }