object
  method bind_or_display_error :
    'data Lwt.t ->
    ('data ->
     (Html5_types.nmtoken list *
      ([> Html5_types.p ] as 'a) Eliom_content.Html5.F.elt list)
     Lwt.t) ->
    (Html5_types.nmtoken list * 'a Eliom_content.Html5.F.elt list) Lwt.t
  method display_error_box :
    ?classes:string list ->
    ?message:string -> ?exc:exn -> unit -> [> `P ] Eliom_content.Html5.F.elt
  method error_class : string
end