psiphp / description-bundle

            'subject_resolver' => $resolverIds,

        ] as $key => $serviceIds) {

            $humanKey = str_replace('_', ' ', $key);

            foreach ($serviceIds as $serviceId => $attributes) {

                $attributes = $attributes[0];

                if (!isset($attributes['alias'])) {

                    throw new \InvalidArgumentException(sprintf(

                        'Description %s "%s" has no "alias" attribute in its tag',

                        $humanKey,

                        $serviceId

                    ));

                }

                $alias = $attributes['alias'];

                $refs[$key][$alias] = new Reference($serviceId);

            }

            $enabled = $container->getParameter(sprintf('psi_description.%ss', $key));

            $diff = array_diff($enabled, array_keys($refs[$key]));

        $extensionIds = $container->findTaggedServiceIds('psi_description.schema_extension');

        $extensionRefs = [];

        foreach ($extensionIds as $extensionId => $attributes) {

            $attributes = $attributes[0];

            if (!isset($attributes['alias'])) {

                throw new \InvalidArgumentException(sprintf(

                    'Description schema extension "%s" has no "alias" attribute in its tag',

                    $extensionId

                ));

            }

            $alias = $attributes['alias'];

            $extensionRefs[$alias] = new Reference($extensionId);

        }

        $enabledEnhancers = $container->getParameter('psi_description.schema.extensions');

        $diff = array_diff($enabledEnhancers, array_keys($extensionRefs));