rithms.html#idp57113536-bb"><span class="identifier">insert_unique_commit</span></a><span class="special">(</span><span class="identifier">node_ptr</span><span class="special">,</span> <span class="identifier">node_ptr</span><span class="special">,</span> 
                                   <span class="keyword">const</span> <span class="identifier">insert_commit_data</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
  <span class="keyword">static</span> <