Instead of displaying multiple notifications, you can create one notification that summarizes them all. For example, a messaging app might have a summary notification that says "3 new messages.” Upon expansion, it could show a snippet for each message.

To set Inbox Style, add the following payload fields :

Payload field key: inboxStyle
Required
Type
: Boolean
Value
: If true, notificaiotns will be stacked. 

Payload field key: nLocale
Optional
Type
: string
Value
: summary text, default is new notifications. 

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