Following the guide for the library here: .html

Setup works fine for Android but fails on iOS. The section 'Permissions & Additional Setup iOS' has the following two lines of code:

Plugin.InAppBilling.InAppBillingImplementation.OnShouldAddStorePayment = OnShouldAddStorePayment;

var current = Plugin.InAppBilling.CrossInAppBilling.Current; //initializes

The first line doesn't build:

'The type or namespace name 'InAppBillingImplementation' does not exist in the namespace 'Plugin.InAppBilling'

and the second line throws the error in the title.

What's happening here?

I'm using the latest version of the package and it's installed in all my projects as suggested. I've gone through the iOS setup too with the relevant permissions/entitlements. I can't find any example projects using the lib.