Superhero2.swift

struct Superhero: SuperheroType {
    
    let name: String
    let secretIdentiy: String
    
    let canFly: Bool
    let powerLevel: Int
}

protocol SuperheroType {
    
    var name: String { get }
    var secretIdentiy: String { get }
    
    var canFly: Bool { get }
    var powerLevel: Int { get }
}

extension SuperheroType {
    
    func flyToLocation(location: Location) {/* implementation */}
    
    func punchVillian(villian: Villian) {/* implementation */}
}