Firebase Interface: Notification admin.messaging.Notification interface static A notification that can be included in admin.messaging.Message. Properties body (string or undefined) Body of the notification. title (string or undefined) Title of the notification. Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 3.0 License, and code samples are licensed under the Apache 2.0 License. For details, see our Site Policies. Java is a registered trademark of Oracle and/or its affiliates. Last updated February 14, 2018.