code: func (r Billing_Order) GetCreditCardTransactions() (resp []datatypes.Billing_Payment_Card_Transaction, err error) {
  	err = r.Session.DoRequest("SoftLayer_Billing_Order", "getCreditCardTransactions", nil, &r.Options, &resp)
  	return
  }
docs: // Retrieve All credit card transactions associated with this order. If this order was not placed with a credit card, this will be empty.