Is there a mechanic in SpiceDB that can be used to switch the permission on a ressource by changing the ressources relationship alone. So lets assume that subject1 relates to ressource1 and has read permisison and subject2 relates to ressource1 and has writepermission but without changing subject 1 or 2 then we can stop subject2 permisison by adding another relation to ressource1, such as if it changes state... ?