word">static</span> <span class="keyword">bool</span> <a class="link" href="splaytree_algorithms.html#idp72516128-bb"><span class="identifier">is_header</span></a><span class="special">(</span><span class="keyword">const</span> <span class="identifier">const_node_ptr</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
  <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> KeyType<span class="special">,</