</li><li><code><a href="argument-2-Error/index.html">Error</a> : <a href="../../../Interface/index.html#module-type-BOOLEAN_ALGEBRA">Interface.BOOLEAN_ALGEBRA</a></code></li></ul><h3 class="heading">Signature</h3><div><div class="spec include"><div class="doc"><details open="open"><summary><span class="def"><code><span class="keyword">include</span> <span class="keyword">sig</span> ... <span class="keyword">end</span></code></span></summary><dl><dt class="spec type" id="type-t"><a href="#type-t" class="anch