a href="Belt_HashSetInt.html#TYPEt">t</a> -> unit</code></pre>
<pre><span id="VALisEmpty"><span class="keyword">val</span> isEmpty</span> : <code class="type"><a href="Belt_HashSetInt.html#TYPEt">t</a> -> bool</code></pre>
<pre><span id="VALadd"><span class="keyword">val</span> add</span> : <code class="type"><a href="Belt_HashSetInt.html#TYPEt">t</a> -> <a href="Belt_HashSetInt.html#TYPEkey">key</a> -> unit</code></pre>
<pre><span id="VALcopy"><span class="keyword">val</span> copy</span> : <code class="typ