Forgive me if this has already been hashed out, but my google-foo isn't working well today.
I have a case where, upon saving a persistent object with a modified attribute value, I need to perform a file migration. The trick is that I need to know both the previous and new values of the attribute in question. I presume that Cayenne is tracking these old/new values in the GraphManager in order to determine which columns to update. So, what is the best way for me to access this changeset? Thanks for the help-- Dave
