@class NSNumber; @interface SignedDuration : INObject @property (class, nonatomic, readonly) BOOL supportsSecureCoding; @property (nonatomic, retain) NSNumber *duration; @property (nonatomic) long long direction; - (id)initWithIdentifier:(id)a0 displayString:(id)a1 pronunciationHint:(id)a2; - (id)initWithCoder:(id)a0; @end