saveCampaignIdToStorage static method
Save Campaign Id to storage
Implementation
static Future<void> saveCampaignIdToStorage(String campaignId) async {
final data = await _doc.get();
final dataList = data?['campaignId'] as List<dynamic>? ?? []
..add(campaignId);
await _doc.set(
{
'campaignId': dataList,
},
SetOptions(merge: true),
);
}