Optional
clickOptional command to run if users click on the label in the notification
Optional
clickOptional label for users to click when the notification shows.
Automatically localized if this is a LocalizeKey.
Text to display to the user.
Automatically localized if this is a LocalizeKey.
Optional
notificationOptional ID of a previous notification to update instead of showing a new notification
Severity of the notification
Data needed to display a notification to the user