How to use TESTFIELD in extensions v2?

Sunset

Hi all, I've got a question that is most likely just me being dense; but I can't find the correct use of TESTFIELD when using it in extensions

In the "old" time TESTFIELD(Type); would make the system check whether Type was empty or not, and throw an error if it was empty. And TESTFIELD(Type, Type::Item); would throw an error if the Type was anything other than Item.
But if I try to use TESTFIELD in the extension constantly get a error saying: The call is ambiguous between the following methods or properties: 'TestField(Joker, Integer)' and 'TestField(Joker, Integer)'

And this is regardless of me trying to make sure a field has a value, or making sure that it has a specific value. What am I missing here?
Please don't tell me I have to make IF THEN ELSE sentences to handle this.

Sunset

It turned out to be simple
You need to put Rec. in front of it. Kinda makes sense since the extension needs to have a reference as to what/where you want to test.

Sunset

It turned out to be simple
You need to put Rec. in front of it. Kinda makes sense since the extension needs to have a reference as to what/where you want to test.