/span> <span class="kt">ViewableImpression</span> <span class="p">:</span> <span class="kt">NSObject</span></code></pre>

                </div>
              </div>
            <p>Undocumented</p>

          </div>
        </section>

        <section class="section">
          <div class="section-content">
            <div class="task-group">
              <ul class="item-container">
                <li class="item">
                  <div>
                    <code>
                    <a name="/c:objc(c