E</span>,</span>
<span>  .stage <span class="op">=</span> <span class="op">(</span><span class="kw">if</span> <span class="op">(</span><span class="fu"><a href="https://rdrr.io/r/base/NULL.html" class="external-link">is.null</a></span><span class="op">(</span><span class="va">.tag</span><span class="op">)</span><span class="op">)</span> <span class="st">""</span> <span class="kw">else</span> <span class="va">.tag</span><span class="op">)</span>,</span>
<span>  .tag <span class="op">=</span> <span class="cn"