 the tree,
  obviously. For updating the tree the node must be stored
  afterwards, <a href="#store_node-2"><code>store_node/2</code></a>.</p>

<h3 class="function"><a name="set_value-2">set_value/2</a></h3>
<div class="spec">
<p><tt>set_value(Value::term(), Node::<a href="#type-tree_node">tree_node()</a>) -&gt; <a href="#type-tree_node">tree_node()</a></tt><br></p>
</div><p>
  Sets the value for a tree_node. It does not update the tree,
  obviously. For updating the tree the node must be stored
  afterward