/span></span></code></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-(&amp;::.*--&gt;)"><a href="#val-(&amp;::.*--&gt;)" class="anchor"></a><code><span><span class="keyword">val</span> (&amp;::.*--&gt;) : 
  <span><span><span>(<span class="type-var">'context</span>, <span class="type-var">'f_in</span>, <span class="type-var">'f_out</span>, <span class="type-var">'arg_payload</span>)</span> <a href="../index.html#type-name_matcher">name_matcher</a></span> <span class="arrow">&#45;&