
 keyframes in the media being played. Returning true is not recommended unless you control the
 media and are comfortable with the back-buffer size exceeding <a href="#getBackBufferDurationUs()"><code>getBackBufferDurationUs()</code></a> by as much as the maximum duration between adjacent keyframes in
 the media.

 <p>Note: Implementations should return a single value. Dynamic changes to the back-buffer are
 not currently supported.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>Whether 