On Jan 27, 10:08 am, Tom Ayerst <tom.aye...@gmail.com> wrote:
> I thought the validator just set "Agent has errors" and you have to check it
> explicitly.
Vars, refs and agents can have validators. A validator on a ref can
prevent the ref from taking on a new value by throwing an exception,
which will cause a roll-back of the transaction.
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