io/r/base/unique.html" class="external-link">unique</a></span><span class="op">(</span><span class="va">bn</span><span class="op">$</span><span class="va">year</span><span class="op">)</span>, name <span class="op">=</span> <span class="fu"><a href="https://rdrr.io/r/base/unique.html" class="external-link">unique</a></span><span class="op">(</span><span class="va">bn</span><span class="op">$</span><span class="va">name</span><span class="op">)</span><span class="op">)</span>,</span></span>
<span class="r-in