>jsffi</span>
<span class="Keyword">if</span> <span class="Identifier">defined</span><span class="Punctuation">(</span><span class="Identifier">fusionJsSetTests</span><span class="Punctuation">)</span><span class="Punctuation">:</span>
  <span class="Keyword">let</span> <span class="Identifier">a</span><span class="Punctuation">:</span> <span class="Identifier">JsSet</span> <span class="Operator">=</span> <span class="Identifier">newJsSet</span><span class="Punctuation">(</span><span class="Punctuation">[</