(u: duration_.DurationValue | typeof HRTime.Type)
| 6000 | }) |
| 6001 | |
| 6002 | const isDurationValue = (u: duration_.DurationValue | typeof HRTime.Type): u is duration_.DurationValue => |
| 6003 | typeof u === "object" |
| 6004 | |
| 6005 | // TODO(4.0): remove HRTime union member |
| 6006 | /** |