.setParameter("invoice_number", "123456")
.setParameter("client_reference_number", "Java SDK Test")
// Add two line items
.addLineItem(
new AmexLineItem()
.itemDescription("Carbon Dioxide")
.quantity(1)
.unitCost("0.00")
)
.addLineItem(
new AmexLineItem()
.itemDescription("Carbonite Chamber")
.quantity(1)
.unitCost("0.00")
)