Array
(
    [2000049] => Array
        (
            [klas] => Array
                (
                    [0] => 21
                )

            [tutorgroep1] => Array
                (
                    [0] => 123
                )

            [tutorgroep2] => Array
                (
                    [0] => 
                )

            [tutorgroep3] => Array
                (
                    [0] => 
                )

            [tutorgroep4] => Array
                (
                    [0] => 
                )

        )

    [1121654] => Array
        (
            [klas] => Array
                (
                    [0] => 18
                )

        )

)