/**
* Figure out if we can stack the next item vertically on top of this rather than side by side
* Used when we've packed a tall item, and have just put a shorter one next to it
* @param Item $item
* @param Item $nextItem
* @param $maxStackDepth
* @param $remainingWeight
* @return bool
*/
protected function canStackItemInLayer(Item $item, Item $nextItem, $maxStackDepth, $remainingWeight)
{
return $nextItem->getDepth() <= $maxStackDepth && $nextItem->getWeight() <= $remainingWeight && $nextItem->getWidth() <= $item->getWidth() && $nextItem->getLength() <= $item->getLength();
}