type alias Temporal.RoundTo
          
Unstable
round methods take one required parameter. If a string is provided, the
resulting Temporal.Duration object will be rounded to that unit. If an
object is provided, its smallestUnit property is required while other
properties are optional. A string is treated the same as an object whose
smallestUnit property value is that string.
T extends DateTimeUnit
      
    SmallestUnit<T> | { smallestUnit: SmallestUnit<T>; roundingIncrement?: number; roundingMode?: RoundingMode;  }