class InitClassImpl : cake1.InitProto {

    required init(x x: Int)

    convenience init()
}

protocol InitProto {

    init(x x: Int)
}

extension InitProto {

    init()
}

struct InitStructImpl : cake1.InitProto {

    init(x x: Int)

    init()
}

protocol P1 {

    func foo1()

    var Ins: Int { get set }

    func foo2(a a: Int, b b: Int)

    subscript(_ a: Int) -> Int { get set }

    func fooConstraint()
}

protocol P2 : cake1.P1 {

    func bar1()

    func bar2()
}

extension P2 {

    func foo1()

    var Ins: Int

    func foo2(a a: Int, b b: Int)

    subscript(_ a: Int) -> Int
}

extension P2 where Self : cake1.P3 {

    func fooConstraint()
}

protocol P3 {

    func p3Required()
}

extension Dictionary.Keys {

    func foo()
}

extension Dictionary.Keys where Key : cake1.P1 {

    func bar()
}


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