string group, bool is_member)
string group, bool is_member)
Add or remove the Individual from the specified group.
If `is_member` is `true`, the Individual will be added to the `group`. If it is `false`, they will be removed from the `group`.
The group membership change will propagate to every Persona in the Individual.
| group | a freeform group identifier |
| is_member | whether the Individual should be a member of the group |
0.1.11