<===> options.yml
---
:warning_todo:
- libsass

<===> input.sass
foo
  bar: baz
  &:hover
    baz:bam

<===> output.css
foo {
  bar: baz;
}

<===> warning
WARNING on line 4 of input.sass:
This selector doesn't have any properties and will not be rendered.

<===> warning-dart-sass
WARNING on line 4, column 5 of input.sass: 
This selector doesn't have any properties and won't be rendered.
  ,
4 |     baz:bam
  |     ^^^^^^^
  '