@class NSString;
@interface _NSLayoutConstraintConstant : NSObject <NSCoding, NSCopying>
@property (readonly, copy, nonatomic) NSString *symbolicValue;
@property (readonly, nonatomic) double numericValue;
+ (id)constantWithSymbolicValue:(id)a0 numericValue:(double)a1;
- (void)dealloc;
- (void)encodeWithCoder:(id)a0;
- (id)initWithCoder:(id)a0;
- (id)copyWithZone:(struct _NSZone { } *)a0;
- (id)initWithSymbolicValue:(id)a0 numericValue:(double)a1;
@end