Cancel ClosureTask help

Undefined Variable $task on line 23. I tried different methods but every time same error.

Code:

$task = $this->getScheduler()->scheduleRepeatingTask($h = new ClosureTask(function(int $currentTick) use($task, $h, $event, $p, $l, &$x, $y, &$z, $block, &$t) : void{   //Line 23
     $l->setBlock(new Position($x, $y, $z, $l), $block);
        $z++;
        $t++;
        if($t == 10){
            $taskid = $h->setTaskId($task->getTaskId());
            $this->getScheduler()->cancelTask($taskid);
           $p->sendMessage("Task cancelled");
        }
        }), 20);

 

Sadly the CancellableClosureTask isn't yet in the 'stable' branch.

 

So.... what can I do?