toJson method
Implementation
Map<String, String>? toJson() {
Map<String, String> map = {};
if (title != null) {
map['title'] = title!;
}
if (description != null) {
map['description'] = description!;
}
if (imageUrl != null) {
map['imageUrl'] = imageUrl!;
}
if (url != null) {
map['url'] = url!;
}
return map.isEmpty ? null : map;
}