Man pages matching name xscreensaver-getimage-file in section 1:

xscreensaver-getimage-file.1.en	debian 10 / xscreensaver-data
xscreensaver-getimage-file.1.en	debian 11 / xscreensaver-data
xscreensaver-getimage-file.1.en	debian 12 / xscreensaver-data