<p>In <a href="https://github.com/mlpack/mlpack/pull/683#discussion_r66459292">src/mlpack/methods/edge_boxes/feature_extraction_impl.hpp</a>:</p>
<pre style='color:#555'>> +#include "feature_extraction.hpp"
> +#include <map>
> +
> +namespace mlpack {
> +namespace structured_tree {
> +
> +template<typename MatType, typename CubeType>
> +StructuredForests<MatType, CubeType>::
> +StructuredForests(const std::map<std::string, int>& inMap)
> +{
> + this->options = inMap;
> +}
> +
> +template<typename MatType, typename CubeType>
> +MatType StructuredForests<MatType, CubeType>::
> +LoadData(MatType& images, MatType& boundaries, MatType& segmentations)
</pre>
<p>Looks like the parameters are good candidates of const.</p>
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