System/Library/Frameworks/Foundation.framework
NSUnitAngle.h
@interface NSUnitAngle : NSDimension <NSSecureCoding>
@property (class, readonly, copy) NSUnitAngle *degrees;
@property (class, readonly, copy) NSUnitAngle *arcMinutes;
@property (class, readonly, copy) NSUnitAngle *arcSeconds;
@property (class, readonly, copy) NSUnitAngle *radians;
@property (class, readonly, copy) NSUnitAngle *gradians;
@property (class, readonly, copy) NSUnitAngle *revolutions;
@property (class, readonly) BOOL supportsSecureCoding;
+ (void)initialize;
+ (id)icuType;
+ (id)baseUnit;
@end