/** @return <code>null</code> iff the tye has syntactic errors */
@Nullable
public static FqName toQualifiedName(@NotNull JetUserType userType) {
List<String> reversedNames = Lists.newArrayList();
JetUserType current = userType;
while (current != null) {
String name = current.getReferencedName();
if (name == null) return null;
reversedNames.add(name);
current = current.getQualifier();
}
return FqName.fromSegments(ContainerUtil.reverse(reversedNames));
}
