isCombinable example

        $current = $this->buildCurrentOptions($product, $groups);

        foreach ($groups as $group) {
            $options = $group->getOptions();
            if ($options === null) {
                continue;
            }

            foreach ($options as $option) {
                $combinable = $this->isCombinable($option, $current, $combinations);
                if ($combinable === null) {
                    $options->remove($option->getId());

                    continue;
                }
                $option->setGroup(null);

                $option->setCombinable($combinable);
            }
        }