ss="identifier">sym</span><span class="special">;</span>

<span class="identifier">sym</span><span class="special">.</span><span class="identifier">add</span>
    <span class="special">(</span><span class="string">"apple"</span><span class="special">,</span> <span class="number">1</span><span class="special">)</span>    <span class="comment">// symbol strings are added in lowercase...</span>
    <span class="special">(</span><span class="string">"banana"</span><span class="special">,</span> <span class="num