">)</span></span>
<span class="r-out co"><span class="r-pr">#&gt;</span> [1] 3</span>
<span class="r-in"></span>
<span class="r-in"><span class="co"># Update value for "a"</span></span>
<span class="r-in"><span class="va">z</span><span class="op">$</span><span class="fu">set_sym</span><span class="op">(</span><span class="st">"a"</span>, <span class="fl">3</span><span class="op">)</span></span>
<span class="r-msg co"><span class="r-pr">#&gt;</span> </span>
<span class="r-msg co"><span class="r-pr">#&gt;</sp