class FruitFormData: NSObject, FormDataSource {
      // Bind your custom model
      typealias BindModel = Fruit
      var basicRows: [BaseRow] = []

      func numberOfSections() -> Int {...}
      func numberOfRows(at section: Int) -> Int {...}
      func row(at indexPath: IndexPath) -> BaseRow {...}

      self.bindModel = fruit

      basicRows.append(StringRow(title: "Name",
                                 icon: "",
                                 kvcKey: "name",
                                 value: fruit.name ?? "",
                                 placeholder: nil,
                                 validator: nil))

      // Row are type safe
      basicRows.append(DoubleRow(title: "Price",
                                 icon: "",
                                 kvcKey: "price",
                                 value: fruit.price,
                                 placeholder: "",
                                 validator: nil))

      // You can build as many rows as you want
      basicRows.append(TextViewRow(title: "Note",
                                   kvcKey: "note",
                                   value: fruit.note ?? "-"))

  }
}

class FruitFormVC: UIViewController {
  private let dataSource: FruitFormData
}

extension FruitFormVC: UITableViewDataSource {
    func numberOfSections(in tableView: UITableView) -> Int {
        return dataSource.numberOfSections()
    }

    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        dataSource.numberOfRows(at: section)
    }

    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {

        let row = dataSource.row(at: indexPath)
        row.baseCell.setup(row)
        row.baseCell.delegate = self
        return row.baseCell
    }
}

extension FruitFormVC: FormCellDelegate {
    func cellDidChangeValue(_ cell: UITableViewCell, value: Any?) {
        let indexPath = tableView.indexPath(for: cell)!
        _ = dataSource.updateItem(at: indexPath, value: value)
    }
}

basicRows.append(StringRow(title: "Name",
                           icon: "",
                           kvcKey: "name",
                           value: fruit.name ?? "",
                           placeholder: nil,
                           validator: {
                           // Custom rules for row validation
                            return !(fruit.name?.isEmpty ?? true)

}))

@objc private func saveButtonTapped() {
    guard dataSource.validateData() else {
        tableView.reloadData()
        return
    }

    navigationController?.popViewController(animated: true)
}

typealias StringRow = TypedRow<String>

class TextViewRow: BaseRow {

    public override var baseCell: FormInputCell {
        return cell
    }

    public override var baseValue: CustomStringConvertible? {
        get { return value }
        set { value = newValue as? String }
    }

    var value: String?

    var cell: TextViewInputCell

    open override func isValueMatchRowType(value: Any) -> Bool {
        let t = type(of: value)
        return String.self == t
    }

    override var description: String {
        return " \(title ?? "")"
    }

    required init(title: String, kvcKey: String, value: String?) {
        self.cell = TextViewInputCell()

        super.init()

        self.title = title
        self.kvcKey = kvcKey
        self.value = value
        self.placeholder = nil
    }
}