chronous operation that was started.
Optionally takes a <a href="dart-core/Map-class.html">Map</a> of <code>arguments</code>.</p>
    </section>
    
    <section class="summary source-code" id="source">
      <h2><span>Implementation</span></h2>
      <pre class="language-dart"><code class="language-dart">void finish({Map arguments}) {
  if (!_hasTimeline) {
    return;
  }
  if (_stack.length == 0) {
    throw new StateError(&#39;Uneven calls to start and finish&#39;);
  }
  if (_filterKey != null) {
    