/**
 * Checks if `value` is classified as a `Function` object.
 *
 * From [LoDash isFunction](https://github.com/lodash/lodash/blob/2f79053d7bc7c9c9561a30dda202b3dcd2b72b90/isFunction.js)
 *
 * @since 1.0.0
 * @category Lang
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is a function, else `false`.
 * @example
 *
 * isFunction(class Any{})
 * // => true
 *
 * isFunction(() => {})
 * // => true
 *
 * isFunction(async () => {})
 * // => true
 *
 * isFunction(function * Any() {})
 * // => true
 *
 * isFunction(Math.round)
 * // => true
 *
 * isFunction(/abc/)
 * // => false
 */
export declare function isFunction(value?: any): value is (...args: any[]) => any;
/**
 *
 * Checks if `value` is classified as a `String` primitive or object.
 *
 * From [LoDash isString](https://github.com/lodash/lodash/blob/master/isString.js)
 *
 * @since 1.0.0
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is a string, else `false`.
 * @example
 *
 * isString('abc')
 * // => true
 *
 * isString(1)
 * // => false
 */
/**
 * Gets the `toStringTag` of `value`.
 *
 * From [LoDash internal getTag](https://github.com/lodash/lodash/blob/master/.internal/getTag.js)
 *
 * @private
 * @param {*} value The value to query.
 * @returns {string} Returns the `toStringTag`.
 */