import { MessageFunctionType, Result } from '../types';
export interface IsISBNErrors {
    TARGET_ARGUMENT_NOT_A_STRING: MessageFunctionType;
}
export declare const IS_ISBN_ERRORS: IsISBNErrors;
/**
 * Test whether the target string is an ISBN number.
 *
 * ### Example
 * ```
 * expect(isISBN('3836221195').value).toBeTruthy()
 * ```
 *
 * @param target The string
 * @param version The ISBN version
 */
export declare function isISBN(target: string, version?: string): Result<boolean | undefined>;