Is there anyway to request the list of permissions that a subject has? ``` definition user {} definition document { relation writer: user relation reader: user /** * edit determines whether a user can edit the document */ permission edit = writer /** * view determines whether a user can view the document */ permission view = reader + writer } ``` For example, using the above schema, I'd want to be able to do query for information like the following: `user:id [document.edit, document.view]`. I'm intending to use this information to control component visibility. Any thoughts or suggestions of other directions to go in?