System/Library/PrivateFrameworks/OfficeImport.framework

OITSUMutablePair.h

NSObject
>
OITSUPair

@interface OITSUMutablePair : OITSUPair

@property (retain, nonatomic) id first;
@property (retain, nonatomic) id second;

- (void)setFirst:(id)a0;
- (void)setSecond:(id)a0;

@end