function isArguments(value) {
      var length = (value && typeof value == 'object') ? value.length : undefined;
      return (isLength(length) && toString.call(value) == argsClass) || false;
    }
Checks if `value` is classified as an `arguments` object.

@static
@memberOf _
@category Lang
@param {*} value The value to check.
@returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
@example

(function() { return _.isArguments(arguments); })();
// => true

_.isArguments([1, 2, 3]);
// => false