Firebase Docs Reference Interface: ApnsPayload admin.messaging.ApnsPayload interface static Represents the payload of an APNs message. Mainly consists of the aps dictionary. But may also contain other arbitrary custom keys. Property aps (non-null admin.messaging.Aps or undefined) The aps dictionary to be included in the message. 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 December 12, 2018.