<p>In <a href="https://github.com/mlpack/mlpack/pull/523#discussion_r60356249">src/mlpack/core/util/split_data.hpp</a>:</p>
<pre style='color:#555'>&gt; @@ -0,0 +1,108 @@
&gt; +#ifndef __MLPACK_CORE_UTIL_SPLIT_DATA_HPP
&gt; +#define __MLPACK_CORE_UTIL_SPLIT_DATA_HPP
&gt; +
&gt; +#include &lt;mlpack/core.hpp&gt;
&gt; +
&gt; +#include &lt;iterator&gt;
&gt; +#include &lt;numeric&gt;
&gt; +#include &lt;random&gt;
&gt; +#include &lt;tuple&gt;
&gt; +#include &lt;vector&gt;
&gt; +
</pre>
<p>Thank you very much, I forgot to remove those useless headers.</p>

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