pushPayload property Null safety
@JsonKey(fromJson: castPlatformMapToDartMap), read / write
Push notification payload @discussion The field can contain a custom payload. For more information about supported fields, see the official Apple documentation on APNs. The payload can contain 2000 characters. This field is invalid if the message is recalled.
Implementation
@JsonKey(fromJson: castPlatformMapToDartMap)
Map<String, dynamic>? pushPayload;