Can the order in associative array change when keys are not midified?

[Andrej Mitrovic via Digitalmars-d-learn]

On 1/1/15, Tobias Pankrath via Digitalmars-d-learn
<digitalmars-d-learn at puremagic.com> wrote:
> You could implement an OrderedMap!(Key, Value) via
> RedBlackTree!(Tuple!(Key, Value), (a,b) => a[0] < b[0]).

We could add this as an alias into Phobos or perhaps as just a
documentation line on the website.