must be manually moved forward using <a href="../../../../com/bumptech/glide/gifdecoder/GifDecoder.html#advance()"><code>advance()</code></a> before requesting the next
 frame.  This method must also be called before you request the first frame or an error will
 occur.

 Implementation adapted from sample code published in Lyons. (2004). <em>Java for Programmers</em>,
 republished under the MIT Open Source License</div>
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