<p>In <a href="https://github.com/mlpack/mlpack/pull/694#discussion_r69914737">src/mlpack/core/data/imputation_methods/custom_imputation.hpp</a>:</p>
<pre style='color:#555'>&gt; + *
&gt; + * Definition and Implementation of the empty CustomImputation class.
&gt; + */
&gt; +#ifndef MLPACK_CORE_DATA_IMPUTE_STRATEGIES_CUSTOM_IMPUTATION_HPP
&gt; +#define MLPACK_CORE_DATA_IMPUTE_STRATEGIES_CUSTOM_IMPUTATION_HPP
&gt; +
&gt; +#include &lt;mlpack/core.hpp&gt;
&gt; +#include &lt;cmath&gt;
&gt; +
&gt; +using namespace std;
&gt; +
&gt; +namespace mlpack {
&gt; +namespace data {
&gt; +
&gt; +template &lt;typename T&gt;
&gt; +class CustomImputation
</pre>
<p>If you can provide some comments on what this class is and what it does (also for the <code>Impute()</code> function), I think it would be really helpful for users.</p>

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