 #if swift(>=3.2)
   @available(iOS 11, *)
   override func viewSafeAreaInsetsDidChange() {
-    self.headerViewController.headerView.minimumHeight =
-        headerMinHeight + self.view.safeAreaInsets.top
-
     // Re-constraint the title label to account for changes in safeAreaInsets's left and right.
     let titleInsets = UIEdgeInsets(top: 0,
                                    left: inset + self.view.safeAreaInsets.left,


    self.addChildViewController(self.headerViewController)

    self.headerViewController.headerView.maximumHeight = 128
    self.headerViewController.headerView.minimumHeight = headerMinHeight + 20

    self.collectionView?.register(MDCCatalogCollectionViewCell.self,
      forCellWithReuseIdentifier: "MDCCatalogCollectionViewCell")


  let spacing = CGFloat(1)
  let inset = CGFloat(16)
  let node: CBCNode
  var headerViewController: MDCFlexibleHeaderViewController
  var titleLabel: UILabel
