When trying to make a refund with the refundCreate mutation, it is necessary to pass in an OrderTransactionInput object to its "transactions" field. This object accepts a "gateway" field, but I can't find any documentation anywhere as to which values it accepts and what they are. I know there is a list of payment gateways in https://www.shopify.com/payment-gateways, but the "gateway" field accepts some values that aren't listed there, such as "bogus" and "cash". Is there any complete list of accepted values or does anyone know how to get them?
