I am writing an extension for the hook
I see that it has 3 params(meta, data, autosave).
I look at data and I see there is channel data in there and a revision post data index.
I assumed that the revision post data contains the old, not updated data.
But when I compared then to the top level data, they are the same. Both also show the updated data.
Is there any way I can access the old data? Do I need to use a different hook?
How do I know if a field value has been changed by edits?