 will resume at this point for the next call.
            </li>
<li class="listitem">
              Provide more output starting at <code class="computeroutput"><span class="identifier">zs</span><span class="special">.</span><span class="identifier">next_out</span></code>
              and update <code class="computeroutput"><span class="identifier">zs</span><span class="special">.</span><span class="identifier">next_out</span></code> and <code class="computeroutput"><span class="identifier">zs</span><span 