offlineSettings property
Offline settings configured by the author of an online web map (if appropriate).
Offline settings optimize the data that is delivered during download and synchronization. For example, they can control feature and attachment delivery or define whether the map's basemap is created using a tile package already on the device.
This property is null unless the map represents an online web map and the author has configured the offline settings.
Implementation
OfflineSettings? get offlineSettings => _offlineSettings.value;