module Val_type: sig .. end
sig
end
type 'a t
'a
val create : ('a -> Tws_prot.raw_tws) -> (Tws_prot.raw_tws -> 'a) -> 'a t
('a -> Tws_prot.raw_tws) -> (Tws_prot.raw_tws -> 'a) -> 'a t