import { MessageFunctionType, Result } from '../types';
export interface IsEmptyErrors {
    TARGET_ARGUMENT_NOT_A_STRING: MessageFunctionType;
}
export declare const IS_EMPTY_ERRORS: IsEmptyErrors;
/**
 * Tests whether the `target` string is empty
 *
 * ### Example
 * ```
 * expect(isEmpty('').value).toBeTruthy()
 * ```
 *
 * Note that `ignore_whitespace` is false by default.
 *
 * @param target The target string
 * @param options The options
 */
export declare function isEmpty(target: string, options: any): Result<boolean | undefined>;