-3" aria-hidden="true" tabindex="-1"></a>  <span class="at">data =</span> tree, </span>
<span id="cb10-4"><a href="#cb10-4" aria-hidden="true" tabindex="-1"></a>  <span class="at">lineend =</span> <span class="st">"round"</span>, </span>
<span id="cb10-5"><a href="#cb10-5" aria-hidden="true" tabindex="-1"></a>  <span class="at">colour =</span> <span class="st">"#555555"</span>,</span>
<span id="cb10-6"><a href="#cb10-6" aria-hidden="true" tabindex="-1"></a>  <span class="at">show.legend =</span> <span class