}
ClusterNode newParent = ClusterUtils.addEmptyIgnoreID(tree, tree);
newParent.addChild(c1);
newParent.addChild(c2);
ClusterUtils.move(c1, parent1, newParent, tree, false);
ClusterUtils.move(c2, parent2, newParent, tree, false);
Logger.getLogger(StackInterpreter.class.getName()).log(Level.FINEST, String.format("CLUSTER (%s) (%s)", c1, c2));