t;&gt;$)" class="anchor"></a><code><span class="keyword">val</span> (&lt;&gt;$) : <span><span>(<span class="type-var">'context</span>, <span class="type-var">'f_in</span>, <span class="type-var">'f_proc_out</span>, <span class="type-var">'arg_payload</span>)</span> <a href="../index.html#type-name_matcher">name_matcher</a></span> <span>&#45;&gt;</span> <span><span>(<span class="type-var">'context</span>, <span class="type-var">'arg</span>, <span class="type-var">'arg</span>, <span class="type-var">'f_