[RSS Feed/News] \XF::asVisitor() should take a callable instead of a \Closure

[XenForo]

As of 2.2.4, the signature of \XF::asVisitor is:
PHP:

public static function asVisitor(\XF\Entity\User $user, \Closure $action, bool $withLanguage = false)

However, asVisitor doesn't actually require that $action be a Closure; it can handle any callable. I don't see any reason to limit it to Closure.

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