What's the idiomatic way to temporarily change the destination of a Laravel Notification?
<p>I have a Notification that is typically sent to the user's stored mobile number. That's easy.</p>

<p>But occasionally, the user can direct us to send it to a number they don't want us to store. The UI is clear (in this rarer case) that they're entrusting us with this number just to deliver this notification.</p>

<p>Is there a reasonable place I can store this one-off destination that <em>isn't</em> on the model?  If I store it in a non-persisting attribute of the model, it's gone by the time the asynchronous job runs.  If I store it in the Notification object (e.g., passed in through the constructor), it doesn't matter because the model's <code>routeNotificationFor*()</code> methods can't see that.</p>