Attribute.Floatingmodule Context : sig ... endval declare : 
  string ->
  'a Context.t ->
  (Astlib.Ast_500.Parsetree.payload, 'b, 'c) Ast_pattern.t ->
  'b ->
  ('a, 'c) tval name : (_, _) t -> stringval convert_res : 
  ('a, 'b) t list ->
  'a ->
  ('b option, Location.Error.t Stdppx.NonEmptyList.t) resultval convert : ('a, 'b) t list -> 'a -> 'b option