Sample multi response layout

gistfile1.m

@interface PNHistoryResult : PNResult
@property (nonatomic) NSDate *start;
@property (nonatomic) NSDate *end;
@end

// no methods on any of these subclasses
@interface PNHereNowResult : PNResult
@property (nonatomic) NSInteger occupancy;
@end

@interface PNResult : NSDictionary
@property (nonatomic) id data;

- (void)methods
@end