; <code>source_should_nest s</code> should be true when we are going one deeper into a call-chain, ie when lt_level should be bumper in the next loc_trace_elem, and similarly for <code>sink_should_nest</code></p></dd></dl><dl><dt class="spec value" id="val-of_source"><a href="#val-of_source" class="anchor"></a><code><span class="keyword">val</span> of_source : <a href="Source/index.html#type-t">Source.t</a> <span>&#45;&gt;</span> <a href="index.html#type-t">t</a></code></dt><dd><p>create a trace from a sour