@Override
public FoldingBuilder forLanguage(Language l) {
FoldingBuilder cached = l.getUserData(getLanguageCache());
if (cached != null) return cached;
List<FoldingBuilder> extensions = forKey(l);
FoldingBuilder result;
if (extensions.isEmpty()) {
Language base = l.getBaseLanguage();
if (base != null) {
result = forLanguage(base);
} else {
result = getDefaultImplementation();
}
} else {
return (extensions.size() == 1)
? extensions.get(0)
: myBuilder == null ? myBuilder = new CompositeFoldingBuilder(extensions) : myBuilder;
}
l.putUserData(getLanguageCache(), result);
return result;
}
