ReactiveObjC (二六)(RACKVOChannel)

@interface RACKVOChannel<ValueType> : RACChannel<ValueType>

- (instancetype)initWithTarget:(__weak NSObject *)target keyPath:(NSString *)keyPath nilValue:(nullable ValueType)nilValue;

- (instancetype)initWithTarget:(NSObject *)target keyPath:(NSString *)keyPath nilValue:(nullable ValueType)nilValue;

- (instancetype)init __attribute__((unavailable("Use -initWithTarget:keyPath:nilValue: instead")));
@end

@interface RACKVOChannel (RACChannelTo)

- (RACChannelTerminal *)objectForKeyedSubscript:(NSString *)key;
- (void)setObject:(RACChannelTerminal *)otherTerminal forKeyedSubscript:(NSString *)key;

@end