{
    "expr": "(  $range := function($start, $end, $step) { (      $step:=($step?$step:1);        $start+$step > $end ? $start : $append($start, $range($start+$step, $end, $step))   )};  $range(0,15,2))        ",
    "dataset": null,
    "bindings": {},
    "result": [
        0,
        2,
        4,
        6,
        8,
        10,
        12,
        14
    ]
}