INDEX | CLUSTER | FEATURES | SHORT | FRAMES | NO FRAMES |
-- Is current set a subset of `other'?
-- Ensure that set includes `v'.
-- Add all items of `other'.
-- Remove `v' if present.
-- Remove all items not in `other'.
-- No effect if `other' is `empty'.
-- Remove all items also in `other'.
INDEX | CLUSTER | FEATURES | SHORT | FRAMES | NO FRAMES |