class Duration implements Cloneable, Serializable, Comparable<Duration>, JAXBable<JAXBDuration> {

public abstract ChronoUnit getChronoUnit()public abstract ChronoUnit getChronoUnit();

public abstract ChronoUnit getChronoUnit()public  Duration(BigDecimal magnitude);
public abstract ChronoUnit getChronoUnit()protected  Duration(long unscaledMagnitude, int scale);

}