hasDeliveryWithOnlyShippingFreeItems example

$context,
                $manualShippingCost
            );

            $delivery->setShippingCosts($costs);

            return;
        }

        if (
            $this->hasDeliveryPriceRecalculationSkipWithZeroUnitPrice($cart->getBehavior(), $delivery->getShippingCosts()->getUnitPrice())
            || $this->hasDeliveryWithOnlyShippingFreeItems($delivery)
        ) {
            $costs = $this->calculateShippingCosts(
                $delivery->getShippingMethod(),
                new PriceCollection([new Price(Defaults::CURRENCY, 0, 0, false)]),
                $delivery->getPositions()->getLineItems(),
                $context
            );
            $delivery->setShippingCosts($costs);

            return;
        }