RSS Feed/News How to throw exception in setup process

[ENXF NET]

I need to throw exception in setup but the class is already extended by AbstractSetup and the exception comes from AbstractController.
Is there an easy way to get the exception and throw a message? Or can I extends two classes at the same time ?

Code:

public function uninstallStep1()
    {
            $data = \XF::finder('My\Addon:Class')->fetchOne();

if ($data['column']) {
                throw $this->exception(
                    $this->error(\XF::phrase('not_valid'))...

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