/**
* Permission keys given to users in each group.
- * This is an array where the keys are all groups and each value is either:
- * a) An array of the format (right => boolean)
- * b) An array of the format (right => namespace => boolean)
+ * This is an array where the keys are all groups and each value is an
+ * array of the format (right => boolean).
*
* The second format is used to support per-namespace permissions.
* Note that this feature does not fully work for all permission types.