type-var">'f</span>, <span class="type-var">'arg_payload</span>)</span> <a href="#type-dispatcher">dispatcher</a></span></span></code></div><div class="spec-doc"><p>Combines matchers to create a dispatcher</p></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-map_matcher"><a href="#val-map_matcher" class="anchor"></a><code><span><span class="keyword">val</span> map_matcher : 
  <span><span><span>(<span class="type-var">'context</span>, <span class="type-var">'f1</span>, <span class=