Swift nested function and variable reference

switf_neste_function_self

class Foo {
    var some:String = "string"
    
    func One() {
        func Nested(weakSelf:Foo) {
            if (weakSelf.some == "integer") { // no error
                
            }
        }
        
        unowned var unownedSelf = self
        Nested(unownedSelf)
    }
}