import { ValidationException } from './ValidationException';
/**
 * Is the value an empty string, null, undefined, NaN or an array, map, object
 * or set with no values?
 *
 * @example
 * ```ts
 * isEmpty('') // true
 * isEmpty([]) // true
 * isEmpty('example') // false
 * ```
 *
 * @param value the value to check
 * @returns a boolean indicating whether the value is the expected type
 */
export declare const isEmpty: (value: unknown) => boolean;
/**
 * Validate that the value is an empty string, null, undefined, NaN or an
 * array, map, object or set with no values.
 *
 * @example
 * ```ts
 * validateEmpty('') // true
 * validateEmpty([]) // true
 * validateEmpty('example') // false
 * ```
 *
 * @param value the value to check
 * @returns `null` if the value is the expected type or a `ValidationException`
 * if not
 */
export declare const validateEmpty: (value: unknown) => ValidationException | null;
/**
 * Assert that the value is an empty string, null, undefined, NaN or an
 * array, map, object or set with no values.
 *
 * @example
 * ```ts
 * assertEmpty('') // true
 * assertEmpty([]) // true
 * assertEmpty('example') // false
 * ```
 *
 * @param value the value to check
 * @throws an `AssertionException` if the value is not the expected type
 */
export declare const assertEmpty: (value: unknown) => void;