This is not quite a package, but if you place the cursor over the first of the methods, start a macro recording and then do: Ctrl-Alt-down Shift-f6 Down arrow button Down arrow carriage return
then stop the macro, now you have a macro that moves on to the next method and renames it as you wish (case of a camel, without underlining). You can then assign this macro to a shortcut and repeat the appropriate number of times. I tried to add the last step to the macro as a key combination that was not bound, and then assign this combination to the macro itself (this was the call itself), but I could not get this to work. Also tried to create another macro that called the first x times, but that would also not help for some reason.