<span class="special">,</span>
    <span class="special">(</span><span class="identifier">member_type0</span><span class="special">,</span> <span class="identifier">member_name0</span><span class="special">,</span> <span class="identifier">key_type0</span><span class="special">)</span>
    <span class="special">(</span><span class="identifier">member_type1</span><span class="special">,</span> <span class="identifier">member_name1</span><span class="special">,</span> <span class="identifier">key_type1</span>