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| protocol Flyable { | |
| func fly() -> String | |
| } | |
| class Airplane: Flyable { | |
| func fly() -> String { | |
| return ("Airplane can fly") | |
| } | |
| } | |
| class Bird: Flyable { | |
| func fly() -> String { | |
| return ("Bird can fly too") | |
| } | |
| } |
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