nature">
          <a href="https://api.flutter.dev/flutter/dart-core/Set-class.html">Set</a><span class="signature">&lt;<wbr><span class="type-parameter"><a href="https://api.flutter.dev/flutter/dart-core/String-class.html">String</a></span>&gt;</span>
          <span class="name ">hasShownPageIds</span>
          <div class="features">read / write</div>

        </section>
        
<section class="desc markdown">
  <p>This set contains all of the ids that has been shown.
It is to solve the quesition that 