| uris -> return (Some (List.map NReference.reference_of_string uris)));
connect_button dialog#uriChoiceAbortButton (fun _ -> return None);
dialog#uriChoiceDialog#show ();
| uris -> return (Some (List.map NReference.reference_of_string uris)));
connect_button dialog#uriChoiceAbortButton (fun _ -> return None);
dialog#uriChoiceDialog#show ();