kotlin-stdlib / kotlin.time / toDuration toDuration Common JVM JS Native 1.6 fun Int.toDuration(unit: DurationUnit): Duration(source) Returns a Duration equal to this Int number of the specified unit. Common JVM JS Native 1.6 fun Long.toDuration(unit: DurationUnit): Duration(source) Returns a Duration equal to this Long number of the specified unit. Common JVM JS Native 1.6 fun Double.toDuration(unit: DurationUnit): Duration(source) Returns a Duration equal to this Double number of the specified unit. Depending on its magnitude, the value is rounded to an integer number of nanoseconds or milliseconds. Exceptions IllegalArgumentException - if this Double value is NaN.