>>> store = ts.KvStore.open({
...     "driver": "ocdbt",
...     "config": {
...         "version_tree_arity_log2": 1
...     },
...     "base": "memory://"
... }).result()
>>> store["a"] = b"b"
>>> store["a"] = b"c"
>>> manifest = ts.ocdbt.dump(store.base).result()
>>> manifest
{'config': {'compression': {'id': 'zstd'},
            'max_decoded_node_bytes': 8388608,
            'max_inline_value_bytes': 100,
            'uuid': '...',
            'version_tree_arity_log2': 1},
 'version_tree_nodes': [{'commit_time': ...,
                         'generation_number': 2,
                         'height': 1,
                         'location': 'versionnode::d/...',
                         'num_generations': 2}],
 'versions': [{'commit_time': ...,
               'generation_number': 3,
               'root': {'location': 'btreenode::d/...',
                        'statistics': {'num_indirect_value_bytes': 0,
                                       'num_keys': 1,
                                       'num_tree_bytes': 35}},
               'root_height': 0}]}
>>> version_tree_node_json = ts.ocdbt.dump(
...     store.base, manifest["version_tree_nodes"][0]["location"]).result()
>>> encoded = ts.ocdbt.undump_version_tree_node(manifest["config"],
...                                             version_tree_node_json)
>>> isinstance(encoded, bytes)
True