filterForContext example

return new RuleLoaderResult($cart, $rules);
        });
    }

    private function loadRules(Context $context): RuleCollection
    {
        if ($this->rules !== null) {
            return $this->rules;
        }

        return $this->rules = $this->ruleLoader->load($context)->filterForContext();
    }

    private function cartChanged(Cart $previous, Cart $current): bool
    {
        $previousLineItems = $previous->getLineItems();
        $currentLineItems = $current->getLineItems();

        return $previousLineItems->count() !== $currentLineItems->count()
            || $previous->getPrice()->getTotalPrice() !== $current->getPrice()->getTotalPrice()
            || $previousLineItems->getKeys() !== $currentLineItems->getKeys()
            || $previousLineItems->getTypes() !== $currentLineItems->getTypes()
        ;