pan> <span class="parameter-name">region</span></span>
            </div>
            )    </section>

    <section class="desc markdown">
    
          <p class="no-docs">Not documented.</p>
    
    </section>

    <section class="summary source-code" id="source">
      <h2>Source</h2>
      <pre><code class="prettyprint lang-dart">@DomName(&apos;TextTrack.addRegion&apos;)
@DocsEditable()
@Experimental() // untriaged
void addRegion(VttRegion region) =&gt; _blink.BlinkTextTrack.instance.addRegion_Callback