import UIKit

protocol Foo: class {
  func foo()
}

class Bar: Foo {
  func foo() {
    print("Success!")
  }
}

class Bazz: UIViewController {
  private let effectView = UIVisualEffectView(effect: UIBlurEffect(style: .dark))
  private let anyField = true
  unowned let bar: Foo
  
  init(_ foo: Foo) {
    bar = foo
    super.init(nibName: nil, bundle: nil)
  }
  
  required init?(coder aDecoder: NSCoder) {
    fatalError("")
  }
}

class Graph {
  let bar: Bar
  let bazz: Bazz
  let closure1: () -> Void
  let closure2: () -> Void
  
  init() {
    let bar = Bar()
    let bazz = Bazz(bar)
    closure1 = { [unowned bar] in
      bar.foo()
    }
    closure2 = { [unowned bar] in
      bar.foo()
    }
    self.bazz = bazz
    self.bar = bar
  }
}

func test() {
  let graph = Graph()
  graph.bazz.bar.foo()
}