">'a</span>)</span>)</span> <span>&#45;&gt;</span> <span>(<span class="type-var">'f</span> * <span class="type-var">'b</span>)</span> * <span>(<span class="type-var">'e</span> * <span class="type-var">'d</span>)</span></code></dt><dt class="spec value" id="val-mon_2"><a href="#val-mon_2" class="anchor"></a><code><span class="keyword">val</span> mon_2 : <span>(<span>(<a href="index.html#type-bound">bound</a> <span>&#45;&gt;</span> <a href="index.html#type-bound">bound</a>)</span> * <span>(<a href="index.html