     case TAG_B_RETURN:
       if isTextField() {
         let textField = textView as! UITextField
-        textField.delegate?.textFieldShouldReturn?(textField)
+        let _ = textField.delegate?.textFieldShouldReturn?(textField)
       }
       else if isTextView() {
         textView?.insertText("\n")

    
    func text() -> String {
      switch self {
      case .custom(let text, let actionButton):
        return text
      default:
        let podBundle = Bundle(for: NKInputView.self)

      switch self {
      case .save, .search, .go:
        return UIColor.white
      case .custom(let _, let actionButton) where actionButton:
        return UIColor.white
      default:
        return nil
