formatNotifications example

/** @var \DateTimeInterface $latestTimestamp */
        $latestTimestamp = $notification->getCreatedAt();
        $latestTimestamp = $latestTimestamp->format(Defaults::STORAGE_DATE_TIME_FORMAT);

        if ($isAdmin) {
            return [
                'notifications' => $notifications,
                'timestamp' => $latestTimestamp,
            ];
        }

        $notifications = $this->formatNotifications($notifications, $source);

        return [
            'notifications' => $notifications,
            'timestamp' => $latestTimestamp,
        ];
    }

    private function formatNotifications(NotificationCollection $notifications, AdminApiSource $source): NotificationCollection
    {
        $responseNotifications = new NotificationCollection();