val unpack_with_fields_check : (Type_struct.Field.t * 'a) Farray.t ‑> t ‑> (Type_struct.Field.t * t) Farray.tval unpack : t ‑> Type_struct.Record_infos.t * (Type_struct.Field.t * t) Farray.tval pack : Type_struct.Record_infos.t ‑> (Type_struct.Field.t * t) Farray.t ‑> t