-type-S/index.html#type-elt">elt</a> = <a href="argument-1-S1/index.html#type-elt">S1.elt</a> * <a href="argument-2-S2/index.html#type-elt">S2.elt</a></span></span></code></summary><div class="odoc-include"><details open="open"><summary class="spec include"><code><span><span class="keyword">include</span> <span class="xref-unresolved">Stdlib</span>.Set.S <span class="keyword">with</span> <span><span class="keyword">type</span> <span class="xref-unresolved">elt</span> = <span class="xref-unresolved">S1</span