@interface NSUnitDuration : NSDimension <NSSecureCoding> @property (class, readonly, copy) NSUnitDuration *hours; @property (class, readonly, copy) NSUnitDuration *minutes; @property (class, readonly, copy) NSUnitDuration *seconds; @property (class, readonly, copy) NSUnitDuration *milliseconds; @property (class, readonly, copy) NSUnitDuration *microseconds; @property (class, readonly, copy) NSUnitDuration *nanoseconds; @property (class, readonly, copy) NSUnitDuration *picoseconds; @property (class, readonly) BOOL supportsSecureCoding; + (void)initialize; + (id)icuType; + (id)baseUnit; + (id)_measurementWithNaturalScale:(id)a0 system:(unsigned long long)a1; @end