Duration

constructor(    years: Int = definedExternally,     months: Int = definedExternally,     weeks: Int = definedExternally,     days: Int = definedExternally,     hours: Int = definedExternally,     minutes: Int = definedExternally,     seconds: Int = definedExternally,     milliseconds: Int = definedExternally,     microseconds: Int = definedExternally,     nanoseconds: Int = definedExternally)(source)