Yoichi Tagaya yoichitgy

## Playground-MercariTechConf2017-DIContainer.swift
protocol Animal {
    func sound() -> String
}
class Cat: Animal {
    func sound() -> String { return "😺Meow" }
}
class Dog: Animal {
    func sound() -> String { return "🐶Bow wow" }
}
	protocol Animal {
	func sound() -> String
	}
	class Cat: Animal {
	func sound() -> String { return "😺Meow" }
	}
	class Dog: Animal {
	func sound() -> String { return "🐶Bow wow" }
	}