 value" id="val-(&lt;=&lt;)"><a href="#val-(&lt;=&lt;)" class="anchor"></a><code><span class="keyword">val</span> (&lt;=&lt;) : <span>(<span class="type-var">'a</span> <span>&#45;&gt;</span> <span><span class="type-var">'b</span> <a href="../argument-1-M/index.html#type-t">M.t</a></span>)</span> <span>&#45;&gt;</span> <span>(<span class="type-var">'c</span> <span>&#45;&gt;</span> <span><span class="type-var">'a</span> <a href="../argument-1-M/index.html#type-t">M.t</a></span>)</span> <span>&#45;&gt;</span> 