gnus-group-update-group
gnus-group-update-group is an autoloaded compiled Lisp function in `gnus-group.el
'.
(gnus-group-update-group GROUP &optional VISIBLE-ONLY INFO-UNCHANGED)
Update all lines where GROUP appear.
If VISIBLE-ONLY is non-nil, the group won't be displayed if it isn't
already. If INFO-UNCHANGED is non-nil, dribble buffer is not updated.