@SuppressWarnings("unchecked")
    @Override
    public Optional<T9> get9() {
        return Optional.ofNullable((T9) values[9]);
    }
Constructs a {@link MutableTuple} of type {@link MutableTuple13}.
common-parent/tuple/src/main/java/com/speedment/common/tuple/internal/mutable/MutableTuple13Impl.java