private lazy var phoneNumberFieldWithRegion: TitledTextField = {
        $0.textField.placeholder = "900 000 00 00"
        $0.textField.leftTextPadding = 0
        $0.textField.keyboardType = .numberPad
        $0.textField.returnKeyType = .done
        $0.successDescription = "Phone number confirmed."
        $0.errorDescription = "Invalid phone number."
        $0.setLeftView(on: regionLabel)
        $0.setRightView(on: regionButton, withSeparator: true, withLoadingIndicator: true)

        $0.textField.publisher(for: .editingChanged)
            .sink { [weak self] in
                let text = self?.phoneNumberFieldWithRegion.textField.text ?? ""
                self?.phoneNumberFieldWithRegion.textField.text = TextFormatter.formatEnterText(text: text, fieldMask: .phoneNumberWithoutRegion)
            }
            .store(in: &cancellables)

        return $0
    }(TitledTextField(title: "Номер телефона", rightViewPadding: 4))

    private lazy var regionLabel: UILabel = {
        $0.text = "+7 "
        $0.font = UIFont(name: Fonts.regular, size: 16)
        return $0
    }(UILabel())

    private let arrowDownImage = UIImage(named: "common.caretDown")!.withRenderingMode(.alwaysTemplate)
    private let regionImage = UIImage(named: "region.russia")!.withRenderingMode(.alwaysOriginal)
    private lazy var regionButton: CustomButton = {
        $0.setImage(arrowDownImage)
        $0.imageView?.contentMode = .scaleAspectFill
        $0.layer.cornerRadius = 6
        $0.imageEdgeInsets = UIEdgeInsets(top: 0, left: 16, bottom: 0, right: 0)

        let regionImageView = UIImageView(image: regionImage)
        $0.addSubview(regionImageView)
        $0.subviews.forEach { $0.translatesAutoresizingMaskIntoConstraints = false }
        NSLayoutConstraint.activate([
            $0.widthAnchor.constraint(equalToConstant: 50),
            regionImageView.leadingAnchor.constraint(equalTo: $0.leadingAnchor, constant: 4),
            regionImageView.centerYAnchor.constraint(equalTo: $0.centerYAnchor)
        ])
        return $0
    }(CustomButton(style: .ghost(defaultTintColor: ColorScheme.gray500, highlightTintColor: ColorScheme.gray600)))

    private func onPhoneNumberWithRegionFieldSubmitted() {
        phoneNumberFieldWithRegion.textFieldState = .loading
        DispatchQueue.main.asyncAfter(deadline: .now() + 2) {
            self.phoneNumberFieldWithRegion.textFieldState = .error
            self.regionButton.buttonState = .normal
        }
        DispatchQueue.main.asyncAfter(deadline: .now() + 4) {
            self.phoneNumberFieldWithRegion.textFieldState = .success
            self.regionButton.buttonState = .normal
        }
        DispatchQueue.main.asyncAfter(deadline: .now() + 6) {
            self.phoneNumberFieldWithRegion.textFieldState = .disabled
            self.regionButton.buttonState = .disabled
        }
        DispatchQueue.main.asyncAfter(deadline: .now() + 8) {
            self.phoneNumberFieldWithRegion.textFieldState = .normal
            self.regionButton.buttonState = .normal
        }
    }