class="identifier">assert</span><span class="special">(</span><span class="keyword">sizeof</span><span class="special">(</span><span class="identifier">avl_set_base_hook</span><span class="special">&lt;</span><span class="identifier">optimize_size</span><span class="special">&lt;</span><span class="keyword">true</span><span class="special">&gt;</span> <span class="special">&gt;)</span> <span class="special">==</span> <span class="number">3</span><span class="special">*</span><span class="keyword">sizeof</sp