span class="op">[</span><span class="va">flow_id</span>, <span class="fu"><a href="https://rdrr.io/r/base/c.html">c</a></span><span class="op">(</span><span class="st">'grp1'</span>, <span class="st">'grp2'</span>, <span class="st">'grp3'</span><span class="op">)</span><span class="op">]</span>
          
          <span class="va">offset</span> <span class="op">&lt;-</span> <span class="fl">5</span>
          
          <span class="co"># Render tooltip</span>
          <span class="fu"><a href="https://rd