s, <a href="#store_node-2"><code>store_node/2</code></a>.</p>

<h3 class="function"><a name="store_node-2">store_node/2</a></h3>
<div class="spec">
<p><tt>store_node(Node::<a href="tree.html#type-tree_node">tree:tree_node()</a>, Tree::<a href="#type-tree">tree()</a>) -&gt; <a href="#type-tree">tree()</a></tt><br></p>
</div><p>
  Adds a new node to the tree, or updates an existing one.</p>

<h3 class="function"><a name="upgrade_node-2">upgrade_node/2</a></h3>
<div class="spec">
<p><tt>upgrade_node(Tree_node,