pan>unit <span class="arrow">&#45;&gt;</span></span> <a href="#type-sharing_env">sharing_env</a></span></code></div><div class="spec-doc"><p>Create a sharing env to store canonical representations</p></div></div><div class="odoc-spec"><div class="spec value" id="val-hpred_compact" class="anchored"><a href="#val-hpred_compact" class="anchor"></a><code><span><span class="keyword">val</span> hpred_compact : <span><a href="#type-sharing_env">sharing_env</a> <span class="arrow">&#45;&gt;</span></span> <span><a h