//deserialize a DataTree; this should clear the old /bug nodes and pathTrie
DataTree tree = new DataTree();
ByteArrayOutputStream baos = new ByteArrayOutputStream();
BinaryOutputArchive oa = BinaryOutputArchive.getArchive(baos);
tree.serialize(oa, "test");
baos.flush();
ByteArrayInputStream bais = new ByteArrayInputStream(baos.toByteArray());
BinaryInputArchive ia = BinaryInputArchive.getArchive(bais);
dserTree.deserialize(ia, "test");