s_matcher</span></code></dt><dt class="spec type" id="type-one_arg"><a href="#type-one_arg" class="anchor"></a><code><span class="keyword">type</span> <span>('context, 'arg_in, 'arg_out, 'f_in, 'f_out, 'arg_payload) one_arg</span></code></dt></dl><dl><dt class="spec value" id="val-any_arg"><a href="#val-any_arg" class="anchor"></a><code><span class="keyword">val</span> any_arg : <span><span>(<span class="type-var">'context</span>, unit, <span class="type-var">_</span>, <span class="type-var">'f</span>, 