컴포지션 레이아웃에서 데이터에따라 섹션 분기처리

리뷰 데이터가 있을때와 없을때 UI를 따로 처리해야하는 경우에 아래 코드처럼 분기 처리

func createReviewColumnSection() -> NSCollectionLayoutSection {
        
        if viewModel?.isReviews == false {
            // Item
            let itemSize = NSCollectionLayoutSize(widthDimension: .fractionalWidth(1.0),heightDimension: .estimated(1))
            let item = NSCollectionLayoutItem(layoutSize: itemSize)
            
            let groupSize = NSCollectionLayoutSize(widthDimension: .fractionalWidth(1.0),heightDimension: .estimated(1))
            let group = NSCollectionLayoutGroup.vertical(layoutSize: groupSize, subitems: [item])
            
            // Section
            let section = NSCollectionLayoutSection(group: group)
            section.contentInsets = NSDirectionalEdgeInsets(top: 16, leading: 20, bottom: 24, trailing: 20)
            section.interGroupSpacing = 16
            
            // Header
            section.boundarySupplementaryItems = [
                NSCollectionLayoutBoundarySupplementaryItem(layoutSize: NSCollectionLayoutSize(widthDimension: .fractionalWidth(1), heightDimension: .absolute(41)), elementKind: UICollectionView.elementKindSectionHeader, alignment: .top)
            ]
            
            // Background
            let sectionBackgroundDecoration = NSCollectionLayoutDecorationItem.background(elementKind: "GrayBackgroundViewInset")
            section.decorationItems = [sectionBackgroundDecoration]
            
            return section
        } else {
            // Item
            let itemSize = NSCollectionLayoutSize(widthDimension: .fractionalWidth(1.0),heightDimension: .estimated(1))
            let item = NSCollectionLayoutItem(layoutSize: itemSize)
            
            let groupSize = NSCollectionLayoutSize(widthDimension: .fractionalWidth(1.0),heightDimension: .estimated(1))
            let group = NSCollectionLayoutGroup.vertical(layoutSize: groupSize, subitems: [item])
            
            // Section
            let section = NSCollectionLayoutSection(group: group)
            section.contentInsets = NSDirectionalEdgeInsets(top: 16, leading: 20, bottom: 24, trailing: 20)
            section.interGroupSpacing = 16
            
            // Header
            section.boundarySupplementaryItems = [
                NSCollectionLayoutBoundarySupplementaryItem(layoutSize: NSCollectionLayoutSize(widthDimension: .fractionalWidth(1), heightDimension: .absolute(41)), elementKind: UICollectionView.elementKindSectionHeader, alignment: .top),
                NSCollectionLayoutBoundarySupplementaryItem(layoutSize: NSCollectionLayoutSize(widthDimension: .fractionalWidth(1), heightDimension: .absolute(61)), elementKind: UICollectionView.elementKindSectionFooter, alignment: .bottom)
            ]
            
            // Background
            let sectionBackgroundDecoration = NSCollectionLayoutDecorationItem.background(elementKind: "GrayBackgroundViewInset")
            section.decorationItems = [sectionBackgroundDecoration]
            
            return section
        }
    }