code: function isString(value) {
      return typeof value == 'string' ||
        value && typeof value == 'object' && toString.call(value) == stringClass || false;
    }
docs: Checks if `value` is a string.
  
  @static
  @memberOf _
  @category Objects
  @param {*} value The value to check.
  @returns {boolean} Returns `true` if the `value` is a string, else `false`.
  @example
  
  _.isString('fred');
  // => true