describeContainerEnvVars example

        $this->output = $output;

        if ($object instanceof ContainerBuilder) {
            (new AnalyzeServiceReferencesPass(false, false))->process($object);
        }

        match (true) {
            $object instanceof RouteCollection => $this->describeRouteCollection($object, $options),
            $object instanceof Route => $this->describeRoute($object, $options),
            $object instanceof ParameterBag => $this->describeContainerParameters($object, $options),
            $object instanceof ContainerBuilder && !empty($options['env-vars']) => $this->describeContainerEnvVars($this->getContainerEnvVars($object), $options),
            $object instanceof ContainerBuilder && isset($options['group_by']) && 'tags' === $options['group_by'] => $this->describeContainerTags($object, $options),
            $object instanceof ContainerBuilder && isset($options['id']) => $this->describeContainerService($this->resolveServiceDefinition($object, $options['id']), $options, $object),
            $object instanceof ContainerBuilder && isset($options['parameter']) => $this->describeContainerParameter($object->resolveEnvPlaceholders($object->getParameter($options['parameter'])), $options),
            $object instanceof ContainerBuilder && isset($options['deprecations']) => $this->describeContainerDeprecations($object, $options),
            $object instanceof ContainerBuilder => $this->describeContainerServices($object, $options),
            $object instanceof Definition => $this->describeContainerDefinition($object, $options),
            $object instanceof Alias => $this->describeContainerAlias($object, $options),
            $object instanceof EventDispatcherInterface => $this->describeEventDispatcherListeners($object, $options),
            \is_callable($object) => $this->describeCallable($object, $options),
            default => throw new \InvalidArgumentException(sprintf('Object of type "%s" is not describable.', get_debug_type($object))),
        };