Huh, what a handy little tool. I can do stuff like this to avoid inlining CSS and getting stupid CSP errors.

{{- $added := ".added{color:#888}" -}}
{{- $css   := resources.FromString "/assets/stylesheets/bookmarks.css" $added | minify | fingerprint -}}
<link rel="stylesheet" href="{{ $css.RelPermalink }}" integrity="{{ $css.Data.Integrity }}" type="text/css">

Nice!