val of_micros : int64 -> tval of_decimal_string : string -> (t, string) Stdlib.resultval to_micros : t -> int64val to_decimal_string : t -> stringval compare : t -> t -> intval equal : t -> t -> boolval add : t -> t -> (t, string) Stdlib.resultval is_negative : t -> boolval absolute : t -> (t, string) Stdlib.resultval pp : Stdlib.Format.formatter -> t -> unit