let badgeAnchor = NSCollectionLayoutAnchor(
	edges: [.top, .trailing],
	fractionalOffset: CGPoint(x: 0.3, y: -0.3)
)
let badgeSize = NSCollectionLayoutSize(
	widthDimension: .absolute(20),
	heightDimension: .absolute(20)
)
let badge = NSCollectionLayoutSupplementaryItem(
	layoutSize: badgeSize,
	elementKind: "badge",
	containerAnchor: badgeAnchor
)
let item = NSCollectionLayoutItem(
	layoutSize: itemSize,
	supplementaryItems: [badge]
)

let header = NSCollectionLayoutBoundarySupplementaryItem(
	contentSize: headerSize,
	elementKind: "header",
	alignment: .top
)
let footer = NSCollectionLayoutBoundarySupplementaryItem(
	layoutSize: footerSize,
	elementKind: "footer",
	alignment: .bottom
)

header.pinToVisibleBounds = true
section.boundarySupplementaryItems = [header, footer]

let background = NSCollectionLayoutDecorationItem.backgorund(elementKind: "background")
section.backgroundItems = [background]

layout.register(
	MyCoolDecorationView.self,
	forDecorationViewOfKind: "background"
)

let headerSize = NSCollectionLayoutSize(
	widthDimension: .fractionalWidth(1.0),
	heightDimension: .estimated(44.0)
)
let header = NSCollectionLayoutBoundarySupplementaryitem(
	layoutSize: headerSize,
	elementKind: "header",
	alignment: .top
)
header.pinToVisibleBounds = true
section.boundarySupplementaryItems = [header, footer]

let leadingItem = NSCollectionLayoutItem(
	layoutSize: leadingItemSize
)
let trailingItem = NSCollectionLayoutItem(
	layoutSize: trailingItemSize
)
let trailingGroup = NSCollectionLayoutGroup.vertical(
	layoutSize: trailingGroupSize,
	subitem: trailingItem,
	count: 2
)
let containerGroup = NSCollectionLayoutGroup.horizontal(
	layoutSize: containerGroupSize,
	subitems: [leadingItem, trailingGroup]
)

section.orthogonalScrollingBehavior = .continuous

enum UICollectionLayoutSectionOrthogonalScrollingBehavior: Int {
	case none
	case continuous
	case continuousGroupLeadingBoundary
	case paging
	case groupPaging
	case groupPagingCentered
}