al-pp"><a href="#val-pp" class="anchor"></a><code><span><span class="keyword">val</span> pp : 
  <span><span>(<span><span class="xref-unresolved">Stdlib</span>.Format.formatter <span class="arrow">&#45;&gt;</span></span> <span><a href="#type-key">key</a> <span class="arrow">&#45;&gt;</span></span> unit)</span> <span class="arrow">&#45;&gt;</span></span>
  <span><span>(<span><span class="xref-unresolved">Stdlib</span>.Format.formatter <span class="arrow">&#45;&gt;</span></span> <span><span class="type-var">'