media should be retained from the keyframe before the current playback position
     minus <a href="#getBackBufferDurationUs()"><code>getBackBufferDurationUs()</code></a>, rather than any sample before or at that
     position.</dd>
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<h4>shouldContinueLoading</h4>
<pre class="methodSignature">boolean&nbsp;shouldContinueLoading&#8203;(long&nbsp;playbackPositionUs,
                   