| Name | Type | Description | Notes |
|---|---|---|---|
| This | Object | A DirectUserset is a sentinel message for referencing the direct members specified by an object/relation mapping. | [optional] |
| ComputedUserset | ObjectRelation | [optional] | |
| TupleToUserset | TupleToUserset | [optional] | |
| Union | Usersets | [optional] | |
| Intersection | Usersets | [optional] | |
| Difference | Difference | [optional] |