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