How to use

getGroups

method

in

org.keycloak.models.cache.infinispan.RealmAdapter

@Override
public List<GroupModel> getTopLevelGroups() {
  List<GroupModel> all = getGroups();
  Iterator<GroupModel> it = all.iterator();
  while (it.hasNext()) {
    GroupModel group = it.next();
    if (group.getParent() != null) {
      it.remove();
    }
  }
  return all;
}