 name="start-2">start/2</a></h3>
<div class="spec">
<p><tt>start(Name::<a href="#type-info">info()</a>, TraceId::<a href="#type-trace_id">trace_id()</a>) -&gt; <a href="#type-span">span()</a></tt><br></p>
</div><p>start a new span on the process dictionary of the current process
  with an existing trace id or with a parent span</p>

<h3 class="function"><a name="start-3">start/3</a></h3>
<div class="spec">
<p><tt>start(Name::<a href="#type-info">info()</a>, TraceId::<a href="#type-trace_id">trace_id()</a>, 