/**
 * Given a valid locale it returns the correspondent prefix if found or +44 otherwise.
 *
 * @param locale BCP 47 language tag of locale, e.g. `"es-ES"`.
 * @param countryCode Two-letter country code (ISO 3166-1 alpha-2).
 */
export declare const setDefaultPrefix: (locale: string, countryCode?: string) => string;
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