an> data</code></em>,
                                                         <em class="parameter"><code><span class="type">GError</span> **error</code></em>);</pre>
<p>
Specifies the type of the function passed to
<a class="link" href="PopplerMedia.html#poppler-media-save-to-callback" title="poppler_media_save_to_callback ()"><code class="function">poppler_media_save_to_callback()</code></a>.  It is called once for each block of
bytes that is "written" by <a class="link" href="PopplerMedia.html#poppler-m