LazyVars_setup.swift

lazy var collectionView = setupCollectionView()

private func setupCollectionView() -> UICollectionView {
    let layout = UICollectionViewFlowLayout()
    layout.minimumInteritemSpacing = 0
    layout.itemSize = CGSize(width: 50, height:50)
    
    // Perform any other customizing to your layout/UICollectionView
    
    return UICollectionView(frame: .zero, collectionViewLayout: layout)
}