[5.x] Support unions in addon event listener discovery #11015
Merged
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Fixes #11012
This adjusts the code to allow for unions, eg.
handle(EventOne|EventTwo $event) { }
which is where the error in #11012 was coming from.It also adds support for
handleWhatever(EventName $event) { }
syntax, since I've lifted the code from Laravel. This is probably a lesser known thing but it works in Laravel so should here.