toJson method
Convert to JSON format with campaignId as key
Implementation
Map<String, dynamic> toJson() {
return {
campaignId: {
'campaignId': campaignId,
'campaignName': campaignName,
'campaignType': campaignType,
'CampaignSlug': campaignSlug,
'variationGroupId': variationGroupId,
'variationGroupName': variationGroupName,
'variation': variation.toJson(),
},
};
}