override func viewDidLoad() {
        super.viewDidLoad()
    
           let layout: UICollectionViewFlowLayout = UICollectionViewFlowLayout()
            let width = UIScreen.main.bounds.width
            layout.sectionInset = UIEdgeInsets(top: 0, left: 20, bottom: 0, right: 20)
            layout.itemSize = CGSize(width: width / 2 - 20, height: width / 2)
            layout.minimumInteritemSpacing = 0
            layout.minimumLineSpacing = 0
            popularServicesCollectionView!.collectionViewLayout = layout
  }