Flow\Helper::json_encode PHP Method

    public static function json_encode($obj = null)
    {
        return json_encode($obj);
    }

 public function test_json_encode()
 {
     $var = array('foo', 'bar', 1, 2, 3, array('x' => 'y'));
     $this->assertEquals(json_encode($var), Helper::json_encode($var));
 }