d2-ui/node_modules-react-15/d2-utilizr/src/isString.js

d2-ui

import isString from 'lodash.isstring';

/**
 * Check if the value is a String
 *
 * @name isString
 * @param param Value to be checked
 * @returns {boolean} Returns true when the `param` is a String
 */
export default isString;