="sourceCode r"><span id="cb19-1"><a href="#cb19-1" aria-hidden="true"></a>DT =<span class="st"> </span><span class="kw">data.table</span>(<span class="dt">x =</span> 1L, <span class="dt">y =</span> 2L)</span>
<span id="cb19-2"><a href="#cb19-2" aria-hidden="true"></a>DT_n =<span class="st"> </span><span class="kw">names</span>(DT)</span>
<span id="cb19-3"><a href="#cb19-3" aria-hidden="true"></a>DT_n</span>
<span id="cb19-4"><a href="#cb19-4" aria-hidden="true"></a><span class="co"># [1] &quot;x&quot; &quo