><span class="type-var">'a</span> <a href="#type-t">t</a></span> <span class="arrow">&#45;&gt;</span></span> <span><span>(<a href="#type-key">key</a> * <span class="type-var">'a</span> * <span><span class="type-var">'a</span> <a href="#type-t">t</a></span>)</span> option</span></span></code></div><div class="spec-doc"><p>Find and remove binding with minimum key. <code>O(log n)</code>.</p></div></div><h2 id="transform"><a href="#transform" class="anchor"></a>Transform</h2><div class="odoc-spec"><div class="s