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 value" id="val-identity"><a href="#val-identity" class="anchor"></a><code><span class="keyword">val</span> identity : <a href="argument-1-J/index.html#type-t">J.t</a> <span>&#45;&gt;</span> bool</code></dt></dl></details></div></div></div></div></body></html>