Where does email notification go if request is Unassigned?

Where does email notification go if request is Unassigned?

If I add a note to a request that is not assigned to a support rep and I select the E-mail note to support rep checkbox, what happens?
As a user, I would expect some kind of message telling me that nobody is assigned to the request - but instead, the dialog box just closes with no notification.

Do you just throw an exception without notification to the user?



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