ChangeSupplier checkDiffResult usage

Is

ChangeSupplier.checkDiffResult used for anything? What is it supposed to do?

Liquibase has some build errors for me because I have null analysis turned on in Eclipse. One of the errors I’m trying to fix is in

DropUniqueConstraintChangeSupplier.checkDiffResult but

I did a search to see where it’s called and I can’t find

anything. In fact, there are no files in the project that contain

“checkDiffResult” except for the implementations of

ChangeSupplier

as far as I can tell.