<p>In <a href="https://github.com/mlpack/mlpack/pull/694#discussion_r69803713">src/mlpack/core/data/imputer.hpp</a>:</p>
<pre style='color:#555'>&gt; + * Given a dataset of a particular datatype, replace user-specified missing
&gt; + * value with a variable dependent on the StrategyType and MapperType.
&gt; + *
&gt; + * @tparam T Type of armadillo matrix used for imputation strategy.
&gt; + * @tparam MapperType DatasetMapper that is used to hold dataset information.
&gt; + * @tparam StrategyType Imputation strategy used.
&gt; + */
&gt; +template&lt;typename T, typename MapperType, typename StrategyType&gt;
&gt; +class Imputer
&gt; +{
&gt; + public:
&gt; +  Imputer(MapperType mapper, bool transpose = true):
&gt; +    mapper(std::move(mapper)),
&gt; +    transpose(transpose)
&gt; +  {
&gt; +    //static_assert(std::is_same&lt;typename std::decay&lt;MapperType&gt;::type,
</pre>
<p>Looks like we can remove the comments here.</p>

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