newsticker--cache-replace-age
newsticker--cache-replace-age is a compiled Lisp function in `newst-backend.el'.
(newsticker--cache-replace-age DATA FEED OLD-AGE NEW-AGE)
Mark all items in DATA in FEED which carry age OLD-AGE with NEW-AGE.
If FEED is 'any it applies to all feeds.  If OLD-AGE is 'any,
all marks are replaced by NEW-AGE.  Removes all pre-formatted contents.