getFeatureIDs method
Implementation
List<String> getFeatureIDs() {
final List<String> ids = [];
if (iso1A2 != null) ids.add(iso1A2!);
if (iso1A3 != null) ids.add(iso1A3!);
if (m49 != null) ids.add(m49!);
ids.add(wikidata);
if (emojiFlag != null) ids.add(emojiFlag!);
if (ccTLD != null) ids.add(ccTLD!);
ids.add(nameEn);
ids.addAll(aliases);
return ids;
}