Problem with 254's library

[toodles9]

We managed to get drivetrain code running using the updated version of wpi. We added try-catch statements inside the Notifier, which allowed us to enable successfully. However, we obtained the Notifier class by decompiling the old wpi version and copy pasting it, so we were wondering if this is acceptable or if there is a better way of doing it? Additionally, we were wondering about the general changes from the 2015 to 2016 libraries, and would we likely have to make further changes to use the 2017 wpi library? Thanks.