<p>In <a href="https://github.com/mlpack/mlpack/pull/703#discussion_r68431699">src/mlpack/methods/edge_boxes/feature_extraction_impl.hpp</a>:</p>
<pre style='color:#555'>&gt; +#include &quot;feature_extraction.hpp&quot;
&gt; +#include &lt;mlpack/methods/pca/pca.hpp&gt;
&gt; +namespace mlpack {
&gt; +namespace structured_tree {
&gt; +
&gt; +/**
&gt; + * Constructor: stores all the parameters in an object
&gt; + * of feature_parameters class.
&gt; + */
&gt; +template&lt;typename MatType, typename CubeType&gt;
&gt; +StructuredForests&lt;MatType, CubeType&gt;::
&gt; +StructuredForests(FeatureParameters F) : params(F) {}
&gt; +
&gt; +/*
&gt; +template&lt;typename MatType, typename CubeType&gt;
&gt; +MatType StructuredForests&lt;MatType, CubeType&gt;::
</pre>
<p>I guess we can remove useless codes, let git help us memorize the codes we written</p>

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