Override (or hook) /src/PrestaShopBundle/Controller/Admin/Sell/Customer/CustomerController.php?

[garciasanchezdani]

Hi,

I need to add two new fields in exportation of admin customers list.

The function which makes the exportation is located in /src/PrestaShopBundle/Controller/Admin/Sell/Customer/CustomerController.php:650

The function is exportAction, but I read this is not possible to override files included in /PrestaShopBundle

Is there any hook available? 

If not...I would update code there, in CustomerController of core, but I dont like it as it is not a good practise. 

Thanks in advance.

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