net.corda.core.utilities.kotlin.Int

days	Extension method for easier construction of Durations in terms of integer days: `val twoDays = 2.days`. `val Int.days: Duration`
exactAdd	Like the + operator but throws ArithmeticException in case of integer overflow. `infix fun Int.exactAdd(b: Int): Int`
hours	Extension method for easier construction of Durations in terms of integer hours: `val twoHours = 2.hours`. `val Int.hours: Duration`
millis	Extension method for easier construction of Durations in terms of integer milliseconds: `val twoMillis = 2.millis`. `val Int.millis: Duration`
minutes	Extension method for easier construction of Durations in terms of integer minutes: `val twoMinutes = 2.minutes`. `val Int.minutes: Duration`
seconds	Extension method for easier construction of Durations in terms of integer seconds: `val twoSeconds = 2.seconds`. `val Int.seconds: Duration`