uot;&quot;&quot;</span>
        <span class="n">serialization_version</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">metadata</span><span class="p">[</span><span class="s1">&#39;version&#39;</span><span class="p">]</span>
        <span class="k">if</span> <span class="n">serialization_version</span> <span class="o">==</span> <span class="n">_SchemaVersions</span><span class="o">.</span><span class="n">V1</span><span class="p">:</span>
            <span cl