_algorithms.html#idp72506176-bb"><span class="identifier">insert_unique_check</span></a><span class="special">(</span><span class="keyword">const</span> <span class="identifier">node_ptr</span> <span class="special">&amp;</span><span class="special">,</span> <span class="keyword">const</span> <span class="identifier">KeyType</span> <span class="special">&amp;</span><span class="special">,</span> <span class="identifier">KeyNodePtrCompare</span><span class="special">,</span> 
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