Safe to remove AA elements while iterating over it via .byKeyValue?

[Per Nordlöw via Digitalmars-d-learn]

Is it safe to remove AA-elements from an `aa` I'm iterating over 
via aa.byKeyValue?

I'm currently doing this:
    foreach (ref kv; aa.byKeyValue)
    {
        if (pred(kv.key))
            aa.remove(kv.key); // ok?
    }
    if (aa.length == 0)
        aa = null;

Is there a better way?