a href="#type-t">t</a></span></code></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-widen"><a href="#val-widen" class="anchor"></a><code><span><span class="keyword">val</span> widen : <span><span class="label">prev</span>:<a href="#type-t">t</a> <span class="arrow">&#45;&gt;</span></span> <span><span class="label">next</span>:<a href="#type-t">t</a> <span class="arrow">&#45;&gt;</span></span> <span><span class="label">num_iters</span>:int <span class="arrow">&#45;&gt;</span></spa