Declared in NSObject+RACKVOWrapper.h

Instance Methods

rac_observeKeyPath:options:observer:block:

- (RACDisposable *)rac_observeKeyPath:(NSString *)keyPath options:(NSKeyValueObservingOptions)options observer:(__weak NSObject *)observer block:(void ( ^ ) ( id value , NSDictionary *change , BOOL causedByDealloc , BOOL affectedOnlyLastComponent ))block