<template be-headed=fonts.gooleapis.com-css-family-indie-flower>
<style>
@import url(https://fonts.googleapis.com/css?family=Indie+Flower);
</style>
<template id=fonts.gooleapis.com-css-family-indie-flower></template>
</template>... places:
<style>
@import url(https://fonts.googleapis.com/css?family=Indie+Flower);
</style>inside document.head.
The purpose of the inner template:
If the template appears multiple times on the page with the same attribute value (fonts.gooleapis.com-css-family-indie-flower), only one instance will get added to document.head.