<div id=foo>
<template shadowrootmode="open">
<style>
div { border: 5px solid black; }
</style>
<div>hello</div>
</template>
</div>
<script src="../include.js"></script>
<script>
    test(() => {
        println(foo.shadowRoot.styleSheets);
        println("Before remove, sheet count: " + foo.shadowRoot.styleSheets.length);
        let style = foo.shadowRoot.firstElementChild;
        style.remove()
        println("After remove, sheet count: " + foo.shadowRoot.styleSheets.length);
        style.innerText = "div { border: 10px solid red; }";
        println("After setting innerText of removed sheet, we're still alive!");
    });
</script>