e">StateStore</a></span>):
    </div>

                <details>
            <summary>View Source</summary>
            <div class="codehilite"><pre><span></span><span class="k">class</span> <span class="nc">CostMemoryStore</span><span class="p">(</span><span class="n">StateStore</span><span class="p">):</span>
    <span class="k">def</span> <span class="nf">all</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">session</span><span class="p">:</span> <span cla