PREnumberableVisitor detect: protocol

> Hi,
> In a couple of places in my app I found that I was writing in effect a
> detect: method using PREnumberableVisitor>>do. So I thought I'd add detect:
> to PREnumberableVisitor which makes the intent of my code much clearer.
> Would this be useful addition generally? I've attached an mcz of
> the PREnumberableVisitor additions and another of tests to exercise the
> additions.
> Nick
>
>
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