protected function getCustomerBillingAddress()
{
if ($this->getCustomer()->getDefaultBillingAddress()) {
return $this->getCustomer()->getDefaultBillingAddress();
} else {
if ($this->getCustomer()->getDefaultShippingAddress()) {
return $this->getCustomer()->getDefaultShippingAddress();
} else {
return $this->getDefaultAddress();
}
}
}