protected function _getSegmentValues()
    {
        return array(
            'customer_group_id' => array(self::XML_PATH_SEGMENT_CUSTOMER_GROUP, function () {
                return $this->_noSessionCall ? 0 : Mage::getSingleton('customer/session')->getCustomerGroupId();
            }),
            'store_id' => array(self::XML_PATH_SEGMENT_STORE, function () {
                return Mage::app()->getStore()->getId();
            }),
            'currency' => array(self::XML_PATH_SEGMENT_CURRENCY, function () {
                return Mage::app()->getStore()->getCurrentCurrencyCode();
            })
        );
    }