/a></h3>
<div class="spec">
<p><tt>get_node(PH::<a href="#type-tree_ph">tree_ph()</a>, Tree::<a href="#type-tree">tree()</a>) -&gt; error | {ok, <a href="#type-tree_node">tree_node()</a>}</tt><br></p>
</div><p>
  Finds a node by using its placeholder. It returns <code>error</code> if it
  cannot be found.</p>

<h3 class="function"><a name="get_pair_tuple-1">get_pair_tuple/1</a></h3>
<div class="spec">
<p><tt>get_pair_tuple(NodePair::<a href="tree.html#type-tree_node">tree:tree_node()</a>) -&gt; {<a href="tr