ssed_capture" class="anchor"></a><code><span><span class="keyword">val</span> string_of_missed_capture : <span><span class="optlabel">?len</span>:int <span class="arrow">&#45;&gt;</span></span> <span><a href="#type-missed_capture">missed_capture</a> <span class="arrow">&#45;&gt;</span></span> string</span></code></div><div class="spec-doc"><p>Serialize a value of type <a href="#type-missed_capture"><code>missed_capture</code></a> into a JSON string.</p><ul class="at-tags"><li class="parameter"><span class="