Different types of relationships a user can have with a grant.
| Enums | |
|---|---|
| CALLER_RELATIONSHIP_TYPE_UNSPECIFIED | Unspecified caller relationship type. | 
| HAD_CREATED | The user created this grant by calling CreateGrantearlier. | 
| CAN_APPROVE | The user is an approver for the entitlement that this grant is parented under and can currently approve/deny it. | 
| HAD_APPROVED | The caller had successfully approved/denied this grant earlier. | 

