tt><br></p>
</div><p>
  Returns the root node of the Tree.</p>

<h3 class="function"><a name="get_value-1">get_value/1</a></h3>
<div class="spec">
<p><tt>get_value(Tree_node::<a href="#type-tree_node">tree_node()</a>) -&gt; term()</tt><br></p>
</div><p>
  Extracts the value from a tree_node.</p>

<h3 class="function"><a name="group_children-5">group_children/5</a></h3>
<div class="spec">
<p><tt>group_children(Tree_node::<a href="#type-tree_node">tree_node()</a>, ChildrenPHs::[<a href="#type-tree_ph">tree_ph