//#region src/utils/country-codes.d.ts
declare function normalizeCountryCode(countryCode: string): string;
declare function isValidCountryCode(countryCode: string): boolean;
/**
 * Validates and normalizes a country code value (single string or array).
 * Returns null if valid, or an error message string if invalid.
 */
declare function validateCountryCode(value: string | string[]): string | null;
//#endregion
export { isValidCountryCode, normalizeCountryCode, validateCountryCode };
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