n class="p">[</span><span class="s1">&#39;contextId&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">context_id</span><span class="o">.</span><span class="n">to_json</span><span class="p">()</span>
        <span class="k">return</span> <span class="n">json</span>

    <span class="nd">@classmethod</span>
    <span class="k">def</span> <span class="nf">from_json</span><span class="p">(</span><span class="bp">cls</span><span class