toMap method
Implementation
Map<String, dynamic> toMap() {
Map<String, dynamic> map = {
'imageUrl': imageUrl,
'content': content,
'title': title,
'eventId': eventId,
'urlForVisitor': urlForVisitor,
'urlForStaff': urlForStaff,
'memo': memo,
'dedup': dedup,
'visibility': visibility,
'customizeMsgType': customizeMsgType
};
map.removeWhere((key, value) => value == null);
return map;
}