What about when you have an exception thrown in a library you started using. You open up the library on github or whatever code hosting system they use. You see

What about when you have an exception thrown in a library you started using. You open up the library on github or whatever code hosting system they use. You see a bunch of var this var that, and you have no idea how to follow through the code yourself. You have lost a huge debugging technique, using your eyes, for your lack of patients for writing a variable type.