">node</span>
        <span class="k">if</span> <span class="n">priority</span> <span class="ow">is</span> <span class="ow">not</span> <span
            class="kc">None</span><span class="p">:</span>
            <span class="n">node</span><span class="o">.</span><span class="n">priority</span> <span class="o">=</span> <span
            class="n">priority</span>
        <span class="bp">self</span><span class="o">.</span><span class="n">balance_down</span><span class="p">()</span>
        <span class="k">ret