The code you have shown is how you access elements in hash references in Perl. It is the same for every hash reference, and that does not tell us much. The important part of the code is how that hash reference is created. Unless you can remember that part, there's not much we can do but guess.

Update: Tanktalus and Joost are demonstrating their excellent guessing skills, but my point still stands. It's very possible that they are right, but we don't really know for sure.