<p>In <a href="https://github.com/mlpack/mlpack/pull/699#discussion_r69018423">src/mlpack/core/tree/rectangle_tree/no_auxiliary_information.hpp</a>:</p>
<pre style='color:#555'>&gt; @@ -99,6 +99,22 @@ class NoAuxiliaryInformation
&gt;    }
&gt;  
&gt;    /**
&gt; +   * The R++ tree requires to split the maximum bounding rectangle of a node
&gt; +   * that is being split. This method is intended for that.
</pre>
<p>It might be useful to add that this method is only necessary for an <code>AuxiliaryInformationType</code> that is being used in conjunction with <code>RPlusTreeSplit</code>.</p>

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