public void visit(Relation r) {
clone = new HistoryRelation(r.getId(), r.getVersion(), r.isVisible(), getCurrentUser(), 0, null, false);
clone.setTags(r.getKeys());
HistoryRelation hr = (HistoryRelation)clone;
for (RelationMember rm : r.getMembers()) {
hr.addMember(new RelationMemberData(rm.getRole(), rm.getType(), rm.getUniqueId()));
}
}
@Override
public void visit(Way w) {