@SuppressWarnings("unchecked")
    @Override
    public Optional<T13> get13() {
        return Optional.ofNullable((T13) values[13]);
    }
Constructs a {@link MutableTuple} of type {@link MutableTuple16}.
common-parent/tuple/src/main/java/com/speedment/common/tuple/internal/mutable/MutableTuple16Impl.java