StackRating
An Elo-based rating system for Stack Overflow
                
    Answers and rating deltas for
    How to reference a class that follows a protocol in return type of function?
| Author | Votes | Δ | 
|---|---|---|
| Airspeed Velocity | 4 | +1.25 | 
| Rob Napier | 1 | -0.79 | 
| Wojtek Surowka | 1 | -0.12 | 
| Nitheesh George | 0 | -2.70 | 
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