parameter-name">flow</span></span> })
    </section>
    <section class="desc markdown">
      <p>Start a synchronous operation labeled <code>name</code>. Optionally takes
a <a href="dart-core/Map-class.html">Map</a> of <code>arguments</code>. This slice may also optionally be associated with
a <a href="dart-developer/Flow-class.html">Flow</a> event. This operation must be finished before
returning to the event queue.</p>
    </section>
    
    <section class="summary source-code" id="source">
      <h2><s