convertToJson method
Implementation
Map<String, dynamic> convertToJson() {
final Map<String, dynamic> data = <String, dynamic>{};
data['id'] = id;
data['title'] = title;
data['body'] = body;
data['userId'] = userId;
data['imagePath'] = imagePath;
//data['payload'] = (payload==null)?null:payload.toJson();
data['payload'] = payload.toJson();
data['channel'] = channel.toJson();
return data;
}