Middle.TypeA type which unifies SizedTypes and UnsizedTypes for declarations
val fold : ('a -> 'b -> 'a) -> 'a -> 'b t -> 'aval t_of_sexp : 'a. (Sexplib0.Sexp.t -> 'a) -> Sexplib0.Sexp.t -> 'a tval sexp_of_t : 'a. ('a -> Sexplib0.Sexp.t) -> 'a t -> Sexplib0.Sexp.tval hash_fold_t :
'a. (Ppx_hash_lib.Std.Hash.state -> 'a -> Ppx_hash_lib.Std.Hash.state) ->
Ppx_hash_lib.Std.Hash.state ->
'a t ->
Ppx_hash_lib.Std.Hash.stateval pp : 'a Fmt.t -> Stdlib.Format.formatter -> 'a t -> unitval to_unsized : 'a t -> UnsizedType.t