>If the layered source supports this command, the lower layer is
    not called automatically. Otherwise, the return value of the lower source is
    used.</p>
</section>
<section class="Ss">
<h2 class="Ss" id="ZIP_SOURCE_CLOSE"><a class="permalink" href="#ZIP_SOURCE_CLOSE"><code class="Dv">ZIP_SOURCE_CLOSE</code></a></h2>
<p class="Pp">The lower layer is closed after the callback returns.</p>
</section>
<section class="Ss">
<h2 class="Ss" id="ZIP_SOURCE_ERROR"><a class="permalink" href="#ZIP_SOURCE_ERROR">