collectPackageItems example

// get all index entries for         // the items that need to be discounted         $applier = new Applier();
        $applierIndexes = $applier->findIndexes($applierKey, $maxItems, $sortedPackages->count(), $originalPackageCount);

        $discountedItems = 0;

        foreach ($sortedPackages as $package) {
            // filter and collect the items of our             // current package and add the matching items to our list             $items = $this->collectPackageItems($package, $applierIndexes);

            // now iterate through all items             // and make sure we only add the collected items             // up to a maximum count depending on our settings             $addItems = new LineItemQuantityCollection();

            foreach ($items as $item) {
                if ($maxItems > self::UNLIMITED && $discountedItems >= $maxItems) {
                    break;
                }