See: https://laravel.com/docs/5.8/notifications
A bunch of stuff to help with using Laravel's built in notification function.
An alternative channel for storing notifications in the database. Laravel provides a built-in 'database' channel but it simply JSON encodes everything. This channel instead lets you have a custom table structure and model for the notification.
A Laravel notification channel for sending notifications on that stores in the database.
When a Notification is converted to a model to send via the CustomDatabaseNotificationChannel, it becomes this CustomDatabaseNotificationModel.
Represents one single line in the notifications table.
Represents one single result from the notifications table, likely the result of a GROUP BY operation.
Technically there is nothing different between this and SingleCustomDatabaseNotificationModel but 2 classes exist to make it clearer what form is being used.
Handles saving and retrieving this CustomDatabaseNotificationModels.