Handling multi-levels variables?

I have this vars:

```JS
const vars = {
fontset: {
size: '14px',
body: '"Mali", cursive',
head: '"Itim", cursive'
}
}

module.exports = {
plugins: {
'postcss-advanced-variables': {
variables: vars
}
}
}
```

How do I use `fontset` in css files? More exactly, does PAV supports this feature?

I think it's called map in SASS.