Does upsert clause API has mixed up generic types?

[mozochek]

DoUpdate have where parameter, which is a callback function with T parameter named old

But T is a generic type for table.

And whats the point of returning table in upsert clause in where when I expect the returning object to be an instance of data object of this table? This is misleading and seems like a bug or I just don't understend how it works and how I can reuse old values when doing upsert.

drift: 2.13.2

[mozochek]

Just looked at tests and saw the examples. I think this API needs to be more clear by adding some examples