Errors.Basetype t = errorval pp : Stdlib.Format.formatter -> [< t ] -> unitval raise_error : [< t ] -> 'aval log_error : string -> [< t ] -> unitval catch : (unit -> 'a) -> ('a, [> t ]) Stdlib.resultval raise_if_error : ('a, [< t ]) Stdlib.result -> 'aval log_if_error : string -> (unit, [< t ]) Stdlib.result -> unitval to_json_string : (Optint.Int63.t, [< t ]) Stdlib.result -> stringval of_json_string : string -> (Optint.Int63.t, [> t ]) Stdlib.result