TableDnD.swift

    func tableView(_ tableView: UITableView, canMoveRowAt indexPath: IndexPath) -> Bool {
        return true
    }

    func tableView(_ tableView: UITableView, moveRowAt sourceIndexPath: IndexPath, to destinationIndexPath: IndexPath) {
        if sourceIndexPath.section != destinationIndexPath.section { return }
        SURDataManager.shared.move(from: sourceIndexPath, to: destinationIndexPath)
    }

    func tableView(_ tableView: UITableView, targetIndexPathForMoveFromRowAt sourceIndexPath: IndexPath, toProposedIndexPath proposedDestinationIndexPath: IndexPath) -> IndexPath {
        if sourceIndexPath.section != proposedDestinationIndexPath.section {
            var row:Int = 0
            if sourceIndexPath.section < proposedDestinationIndexPath.section {
                row = tableView.numberOfRows(inSection: sourceIndexPath.section) - 1
            }
            return IndexPath(row: row, section: sourceIndexPath.section)
        }
        return proposedDestinationIndexPath
    }

    //MARK:- UITableViewDragDelegate implements

    func tableView(_ tableView: UITableView, itemsForBeginning session: UIDragSession, at indexPath: IndexPath) -> [UIDragItem] {
        return []
    }