| `Dir uri | `Uri uri -> uri
| `Whelp (query, _) -> query
+let entry_of_string = function
+ | "about:blank" -> `About `Blank
+ | "about:proof" -> `About `Current_proof
+ | "about:us" -> `About `Us
+ | _ -> (* only about entries supported ATM *)
+ raise (Invalid_argument "entry_of_string")
+
class type mathViewer =
object
(** @param reuse if set reused last opened cic browser otherwise