de></a>.</p></dd></dl><dl><dt class="spec value" id="val-string_of_profiler_sample"><a href="#val-string_of_profiler_sample" class="anchor"></a><code><span class="keyword">val</span> string_of_profiler_sample : <span>?&#8288;len:int</span> <span>&#45;&gt;</span> <a href="index.html#type-profiler_sample">profiler_sample</a> <span>&#45;&gt;</span> string</code></dt><dd><p>Serialize a value of type <a href="index.html#type-profiler_sample"><code>profiler_sample</code></a> into a JSON string.</p><dl><dt>paramet