><span class="fu">title_options</span><span class="op">(</span>title.main <span class="op">=</span> <span class="st">"My fancy title"</span>, title.estvar <span class="op">=</span> <span class="st">"Estimate title"</span><span class="op">)</span></span></span>
<span class="r-out co"><span class="r-pr">#&gt;</span> $title.main</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> [1] "My fancy title"</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> </span>
<span class="r-out co"><span cl