ate : <span>int <span class="arrow">&#45;&gt;</span></span> <span>float <span class="arrow">&#45;&gt;</span></span> <a href="#type-state">state</a></span></code></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-default_checkpoint_fun"><a href="#val-default_checkpoint_fun" class="anchor"></a><code><span><span class="keyword">val</span> default_checkpoint_fun : <span><span>(<span>string <span class="arrow">&#45;&gt;</span></span> <span class="type-var">'a</span>)</span> <span class="