>f</span>(<span class="tm-vr">thing</span>: <span class="tm-typ">string</span> | <span class="tm-typ">number</span> | <span class="tm-typ">boolean</span> | <span class="tm-typ">object</span>) {
  <span class="tm-kw">if</span> (<span class="tm-kw">typeof</span> <span class="tm-vr">thing</span> === <span class="tm-str">'string'</span> || <span class="tm-kw">typeof</span> <span class="tm-vr">thing</span> === <span class="tm-str">'number'</span>) {
    <span class="tm-kw">return</span> <span class="error" tabin