media/js/vendor/lodash/lodash.underscore.js
function isString(value) {
    return typeof value == 'string' ||
      value && typeof value == 'object' && toString.call(value) == stringClass || false;
  }
function isString(value) {
    return typeof value == 'string' ||
      value && typeof value == 'object' && toString.call(value) == stringClass || false;
  }
function isString ( value ) { return typeof value == 'string' || value && typeof value == 'object' && toString . call ( value ) == stringClass || false ; }
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
Checks if value is a string .