declaration/definition
save groups
At the start of a rule, a save groups declaration, together with the other local declarations and save declarations, can be used to save the groups currently active. When the rule ends, the groups will be restored, no matter what changes have been made to them while the rule is processing.
The save groups declaration is like the save declaration except that it applies to groups rather than to OmniMark shelves.
The save groups declaration must appear before any actions.