configureSupplementaryView: { dataSource, collectionView, kind, indexPath in
  let sectionItem = dataSource[indexPath.section]
  let header = collectionView.dequeueReusableSupplementaryView(
    ofKind: kind,
    for: indexPath) as HeaderView
  header.reactor = HeaderViewReactor(section: sectionItem.model)
  header.rx.rightButtonDidTap
    .map { Reactor.Action.rightButtonDidTap(sectionItem.model) }
    .bind(to: self.reactor!.action)
    .disposed(by: self.disposeBag)
  return header
}

case .rightButtonDidTap(let sectionType):
  let type = "\(sectionType)"
  os_log(.debug, "\(type)")
  switch sectionType {
  case .upcoming:
    self.steps.accept(AppStep.reminderIsRequired)
  case .timeline:
    self.steps.accept(AppStep.filterIsRequired(self.currentSortType.value))
  }
  return .empty()
}

configureSupplementaryView: { dataSource, collectionView, kind, indexPath in
  let sectionItem = dataSource[indexPath.section]
  let header = collectionView.dequeueReusableSupplementaryView(
    ofKind: kind,
    for: indexPath) as HeaderView
  header.reactor = HeaderViewReactor(section: sectionItem.model)
  header.rx.rightButtonDidTap
    .map { Reactor.Action.rightButtonDidTap(sectionItem.model) }
    .bind(to: self.reactor!.action)
    .disposed(by: self.disposeBag)
  return header
}

self.collectionView.rx.didEndDisplayingSupplementaryView
  .asDriver(onErrorRecover: { _ in return .empty()})
  .drive(with: self, onNext: { _, endDisplayingView in
    print(endDisplayingView)
.disposed(by: self.disposeBag)

self.collectionView.rx.didEndDisplayingSupplementaryView
  .asDriver(onErrorRecover: { _ in return .empty()})
  .drive(with: self, onNext: { _, endDisplayingView in
    let (view, _, _) = endDisplayingView
    guard let view = view as? HeaderView else { return }
    print(view)
    view.disposeBag = DisposeBag()
  })
  .disposed(by: self.disposeBag)

header.rx.methodInvoked(#selector(UICollectionViewDelegate.collectionView(_:didEndDisplayingSupplementaryView:forElementOfKind:at:)))
  .subscribe(onNext: {

  })
  .disposed(by: <#T##DisposeBag#>)

header.rx.rightButtonDidTap
  .map { Reactor.Action.rightButtonDidTap(sectionItem.model) }
  .subscribe(onNext: {
    self.reactor!.action.onNext($0)
  })
  .disposed(by: self.disposeBag)

header.rx.rightButtonDidTap
  .map { Reactor.Action.rightButtonDidTap(sectionItem.model) }
  .subscribe(onNext: {
    self.reactor!.action.onNext($0)
  })
  .disposed(by: header.disposeBag) // 👊 이 부분