at.formatter <span class="arrow">&#45;&gt;</span></span> <span><a href="#type-action">action</a> <span class="arrow">&#45;&gt;</span></span> unit</span></code></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-pp_action_desc"><a href="#val-pp_action_desc" class="anchor"></a><code><span><span class="keyword">val</span> pp_action_desc : <span><span class="xref-unresolved">Stdlib</span>.Format.formatter <span class="arrow">&#45;&gt;</span></span> <span><a href="#type-action_desc">actio