@property (nonatomic, readonly) NSUInteger count;
+ (id)mappingWithContentsOfURL:(NSURL *)url
- mappings:(NSArray *)mappings
+ mappings:(id <NSFastEnumeration>)mappings
error:(NSError **)error;
- (id)initWithName:(NSString *)name;
- (id)initWithSerialization:(NSDictionary *)serialization
- mappings:(NSArray *)mappings;
+ mappings:(id <NSFastEnumeration>)mappings;
- (NJOutput *)objectForKeyedSubscript:(NJInput *)input;
- (void)setObject:(NJOutput *)output forKeyedSubscript:(NJInput *)input;