Array
(
    [2000049] => Array
        (
            [klas] => 21
            [tutorgroep1] => 122
            [tutorgroep2] => 122
            [tutorgroep3] => 123
            [tutorgroep4] => 
        )

    [1121654] => Array
        (
            [klas] => 15
        )

)