div class="odoc-spec"><div class="spec value" id="val-rewrite_top_down" class="anchored"><a href="#val-rewrite_top_down" class="anchor"></a><code><span><span class="keyword">val</span> rewrite_top_down : <span><span>( <span><a href="#type-term">term</a> <span class="arrow">&#45;&gt;</span></span> <span><a href="#type-term">term</a> <span class="xref-unresolved">Base</span>.option</span> )</span> <span class="arrow">&#45;&gt;</span></span> <span><a href="#type-term">term</a> <span class="arrow">&#45;&gt;</sp