protected function getWriteableAttributes()
{
return array('first_name', 'last_name', 'name_on_account', 'company', 'ip_address', 'address1', 'address2', 'city', 'state', 'country', 'zip', 'phone', 'vat_number', 'number', 'month', 'year', 'verification_value', 'account_number', 'routing_number', 'account_type', 'paypal_billing_agreement_id', 'amazon_billing_agreement_id', 'currency', 'token_id');
}