import { MessageFunctionType, Result } from '../types';
export interface IsISO31661Alpha3Errors {
    TARGET_ARGUMENT_NOT_A_STRING: MessageFunctionType;
}
export declare const IS_ISO31661ALPHA_ERRORS: IsISO31661Alpha3Errors;
/**
 * Check whether the `target` string is a valid
 * ISO 3166-1 alpha-3 officially assigned country code
 *
 * ### Example
 * ```
 * expect(isISO31661Alpha3('ABW').value).toBeTruthy()
 * ```
 * @param target The target string
 */
export declare function isISO31661Alpha3(target: string): Result<boolean | undefined>;