newsticker--buffer-set-invisibility

newsticker--buffer-set-invisibility is a compiled Lisp function in `newst-plainview.el'.

(newsticker--buffer-set-invisibility START END)

Add invisibility properties according to nt-type property.
Scans the buffer between START and END. Sets the 'invisible
property to '(<nt-type>-<nt-age> <nt-type> <nt-age>).