type-t">t</a> = <span><span>(<a href="module-type-BOUNDED_F/argument-1-Ok/index.html#type-t">Ok.t</a>, <a href="module-type-BOUNDED_F/argument-2-Error/index.html#type-t">Error.t</a>)</span> Stdlib.result</span></code></div><div class="spec module-type" id="module-type-FOLDABLE_F"><a href="#module-type-FOLDABLE_F" class="anchor"></a><code><span class="keyword">module</span> <span class="keyword">type</span> <a href="module-type-FOLDABLE_F/index.html">FOLDABLE_F</a> = <span class="keyword">functor</span> (<a