"><a href="#val-is_bottom" class="anchor"></a><code><span class="keyword">val</span> is_bottom : <a href="index.html#type-t">t</a> <span>&#45;&gt;</span> bool</code></dt><dd><p>Return true if this is the bottom value</p></dd></dl></details></div></div></div><div class="spec module" id="module-Sources"><a href="#module-Sources" class="anchor"></a><code><span class="keyword">module</span> <a href="Sources/index.html">Sources</a> : <span class="keyword">sig</span> ... <span class="keyword">end</span></code></d