 <span class="arrow">&#45;&gt;</span></span> <span><a href="#type-trace_loc">trace_loc</a> <span class="arrow">&#45;&gt;</span></span> unit</span></code></div><div class="spec-doc"><p>Output a JSON value of type <a href="#type-trace_loc"><code>trace_loc</code></a>.</p></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-string_of_trace_loc"><a href="#val-string_of_trace_loc" class="anchor"></a><code><span><span class="keyword">val</span> string_of_trace_loc : <span>?len:int <span clas