amounts

Fixed tip amounts in pence, displayed as selectable options in GratuityMode.CONFIGURED mode. E.g. listOf(100, 200, 300) renders as £1.00, £2.00, £3.00. Not applicable in GratuityMode.STANDARD mode — an IllegalArgumentException will be thrown. Maximum 3 amounts; an IllegalArgumentException will be thrown if exceeded. All values must not be negative; an IllegalArgumentException will be thrown otherwise.