| Interface | Description | 
|---|---|
| FallbackFactory<T> | Used to control the fallback given its cause. | 
| SetterFactory | Used to control properties of a hystrix command. | 
| Class | Description | 
|---|---|
| FallbackFactory.Default<T> | Returns a constant fallback after logging the cause to FINE level. | 
| HystrixDelegatingContract | This special cases methods that return  HystrixCommand,Observable, orSingleso that they
 are decoded properly. | 
| HystrixFeign | Allows Feign interfaces to return HystrixCommand or rx.Observable or rx.Single objects. | 
| HystrixFeign.Builder | |
| SetterFactory.Default | Default behavior is to derive the group key from  Target.name()and the command key fromFeign.configKey(Class, Method). | 
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