docs: public static TypeFactory<?> typeFactory( TypeFactory<?> type,
                                                int tupleSize ) {
          if (tupleSize <= 1) return type;
          if (tupleSize == 2) return typeFactory(type, type);
          if (tupleSize == 3) return typeFactory(type, type, type);
          if (tupleSize == 4) return typeFactory(type, type, type, type);
          Collection<TypeFactory<?>> types = new ArrayList<>(tupleSize);
          for (int i = 0; i != tupleSize; ++i) {
              types.add(type);
          }
          return new TupleNTypeFactory(types);
      }