After applying the migrator changes, you might need to do some manual changes in order to build the project.
Some compiler errors might have some fixits; Xcode suggests these fixits and most of them are applied already by the migrator, but if the fixit does not fit almost 100% in the given scenario, then you might need to do it manually.
It is not necessary that the code that the migrator supplies is ideal, even if it compiles correctly. Use your best judgement and check that the changes are appropriate for your project.
