// 定义 FocusHandledResult 枚举
enum FocusHandledResult {
    Self = 'Self',
    System = 'System'
}

// 定义 KeyEventArgs 接口，模拟 C# 中的 KeyEventArgs 类
interface KeyEventArgs {
    key: string;
}

// 定义 CurrencyRateEditorHelper 类
class CurrencyRateEditorHelper {
    // 定义静态属性 CurrencyRateEditorFocusHandled
    static CurrencyRateEditorFocusHandled: (sender: any, e: KeyEventArgs) => FocusHandledResult = (sender, e) => {
        if (e.key === 'Left' || e.key === 'Right') {
            return FocusHandledResult.Self;
        }
        return FocusHandledResult.System;
    };
}

export { CurrencyRateEditorHelper, FocusHandledResult };