}
@Test
public void testSiblingsNested() {
RevTreeBuilder oldRoot = new RevTreeBuilder(odb);
RevTree tree1 = new RevTreeBuilder(odb).put(blob("blob")).build();
RevTree tree2 = new RevTreeBuilder(odb).put(blob("blob")).build();
ObjectId newRootId1 = writeBack.setAncestor(oldRoot).setChildPath("subtree1/level2")
.setTree(tree1).call();
ObjectId newRootId2 = writeBack.setAncestor(odb.getTree(newRootId1).builder(odb))