class HotelAvailableRoomsTVCell: UITableViewCell {

    @IBOutlet weak var collectionView: UICollectionView!

 //MARK: Life cycle
    override func awakeFromNib() {
        super.awakeFromNib()
        let nib = UINib.init(nibName: "AvailableRoomCVCell", bundle: nil)
        collectionView.register(nib, forCellWithReuseIdentifier: "AvailableRoomCVCell")
        collectionView.delegate = self
        collectionView.dataSource = self
        // Initialization code
    }
func initCellWithData(roomJSON:JSON,indexPath:IndexPath,isSingle:Bool) {
      DispatchQueue.main.async {
            self.collectionView.reloadData()
        }

}
  }

In viewController:

 func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell  {
  let cell = tableView.dequeueReusableCell(withIdentifier: "HotelAvailableRoomsTVCell", for: indexPath) as! HotelAvailableRoomsTVCell
        cell.delegate = self
 cell.initCellWithData(roomJSON: (json)!, indexPath: indexPath as IndexPath, isSingle: true)
return cell;
}