Error in Sample Code in ReadMe

[go-arun]

data := map[string]interface{}{
    "amount":          1234,
    "currency":        "INR",
    "receipt_id":      "some_receipt_id",
}
body, err := client.Order.Create(data)

Error getting is given below ( function client.Order.Create() required two arguments , Right ?)

./main.go:19:45: not enough arguments in call to client.Order.Create
        have (map[string]interface {})
        want (map[string]interface {}, map[string]string)