Hi, I'm trying to understand a part of the `changesFile` equation, specifically `oldstat`. ``` changesFile :: Checkable p i => p i -> FilePath -> Property i changesFile p f = checkResult getstat comparestat p where getstat = catchMaybeIO $ getSymbolicLinkStatus f comparestat oldstat = do newstat <- getstat return $ if samestat oldstat newstat then NoChange else MadeChange ``` As we see, we catch `getstat` given `f`, but what I don't understand or see, is how is `oldstat` been passed/generated? Thanks for the help.