| `HBugs of [ `Tutors ] (* list of available HBugs tutors *)
| `Metadata of [ `Deps of [`Fwd | `Back] * UriManager.uri ]
| `Uri of UriManager.uri (* cic object uri *)
| `HBugs of [ `Tutors ] (* list of available HBugs tutors *)
| `Metadata of [ `Deps of [`Fwd | `Back] * UriManager.uri ]
| `Uri of UriManager.uri (* cic object uri *)