NodeBuilder b2 = ns.getRoot().builder();
createNodes(b2, "/etc/workflow/instance1");
tds.reset();
//3. Merge which does a rebase
ns.merge(b2, new CommitHook() {
public NodeState processCommit(NodeState before, NodeState after, CommitInfo info) throws CommitFailedException {
NodeBuilder rb = after.builder();
createNodes(rb, "/oak:index/prop-a/a1");
//2.1 Commit some change under prop-