="keyword">val</span> empty_summary : <a href="index.html#type-summary">summary</a></code></dt><dt class="spec value" id="val-pp_summary"><a href="#val-pp_summary" class="anchor"></a><code><span class="keyword">val</span> pp_summary : <a href="index.html#module-F">F</a>.formatter <span>&#45;&gt;</span> <a href="index.html#type-summary">summary</a> <span>&#45;&gt;</span> unit</code></dt><dt class="spec value" id="val-integrate_summary"><a href="#val-integrate_summary" class="anchor"></a><code><span class="ke