payload property
APNs payload as a JSON object, including both aps
dictionary and custom
payload.
See
Payload Key Reference.
If present, it overrides google.firebase.fcm.v1.Notification.title and
google.firebase.fcm.v1.Notification.body. The backend sets a default value
for apns-expiration
of 30 days and a default value for apns-priority
of 10 if not explicitly set.
The values for Object must be JSON objects. It can consist of num
,
String
, bool
and null
as well as Map
and List
values.
Implementation
core.Map<core.String, core.Object?>? payload;