patcher</a></span> <span>&#45;&gt;</span> <span><span>(<span class="type-var">'context</span>, <span class="type-var">'f</span>, <span class="type-var">'arg_payload</span>)</span> <a href="index.html#type-dispatcher">dispatcher</a></span></code></dt><dd><p>Merges two dispatchers into a dispatcher</p></dd></dl><dl><dt class="spec type" id="type-args_matcher"><a href="#type-args_matcher" class="anchor"></a><code><span class="keyword">type</span> <span>('context, 'f_in, 'f_proc_out, 'f_out, 'arg_payload) arg