pre>

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            <p>Represents an object that is both an observable sequence as well as an observer.</p>

<p>Each notification is broadcasted to all subscribed and future observers, subject to buffer trimming policies.</p>

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          <section class="section task-group-section">
            <div class="task-group">
              <ul>
                <li class="item">
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                    <code>
                    <a nam