protected function _prepareCollection()
    {

        /** @var Adyen_Payment_Model_Resource_Billing_Agreement_Collection $collection */
        $collection = Mage::getResourceModel('adyen/billing_agreement_collection')
            ->addCustomerDetails();
        $collection->addNameToSelect();
        $this->setCollection($collection);

        call_user_func(array(get_parent_class(get_parent_class($this)), __FUNCTION__));
        return $this;
    }