addSubgroup(_:)
Adds a subgroup to another group.
Declaration
func addSubgroup(_ group: ABGroup!) -> BoolParameters
- group:
The group to add as a subgroup.
Return Value
Discussion
If the group argument is already part of the receiver, this method does nothing and returns false. If adding the group would create a recursion, this method also does nothing and returns false. (For example, if the group Animal Lovers is in Dog Lovers, and you add Dog Lovers to Animal Lovers, that would create a recursion, which this method won’t allow.) If the group argument is nil, this method raises an exception.