ode r"><code><span><span class="fu">ts_fst</span><span class="op">(</span></span>
<span>  <span class="va">ts</span>,</span>
<span>  <span class="va">sample_sets</span>,</span>
<span>  mode <span class="op">=</span> <span class="fu"><a href="https://rdrr.io/r/base/c.html" class="external-link">c</a></span><span class="op">(</span><span class="st">"site"</span>, <span class="st">"branch"</span>, <span class="st">"node"</span><span class="op">)</span>,</span>
<span>  windows <span class="op">=</span> <span cl