# DurationRoundTo

`import { DurationRoundTo } from "destack:time";`

Options for `Duration.round`.

```ds title="DurationRoundTo"
export type DurationRoundTo = SmallestUnit<DateTimeUnit> | ({ smallestUnit: SmallestUnit<DateTimeUnit>; largestUnit?: LargestUnit<DateTimeUnit> } | { smallestUnit?: SmallestUnit<DateTimeUnit>; largestUnit: LargestUnit<DateTimeUnit> }) & { roundingIncrement?: float64; roundingMode?: RoundingMode }
```

[language/library/src/time/option.ds:70:93](https://github.com/destack-sh/destack/blob/main/language/library/src/time/option.ds#L70-L93)