/ push {1} back to main-context</span>
        <span class="identifier">sink</span><span class="special">(</span><span class="number">1</span><span class="special">);</span> <span class="comment">// push {1} back to main-context</span>
        <span class="identifier">sink</span><span class="special">(</span><span class="number">2</span><span class="special">);</span> <span class="comment">// push {2} back to main-context</span>
        <span class="identifier">sink</span><span class="special">(</span><span