<?php
    public function filterEmptyDeliveryWindows(TimelineCarList $inventoryPlanningCarList): TimelineCarList
    {
        $inventoryPlanningCars = [];

        foreach ($inventoryPlanningCarList->getInventoryPlanningCars() as $inventoryPlanningCar)
            if ($inventoryPlanningCar->getDeliveryWindowList()->hasDeliveryWindows() === true)
                $deliveryWindows = [];

                foreach ($inventoryPlanningCar->getDeliveryWindowList()->getDeliveryWindows() as $deliveryWindow)
                    if ($this->shouldBeDisplayedInTimeline($deliveryWindow))
                        $deliveryWindows[] = $deliveryWindow;



                if (count($deliveryWindows) > 0)
                    $inventoryPlanningCars[] = new TimelineCar(
                        $inventoryPlanningCar->getCarName(),
                        new DeliveryWindowList($deliveryWindows)
                    );




        return new TimelineCarList($inventoryPlanningCars);
    }