Page Collections: Exclude Taxonomy

Hi,

I am using the awsome page collection feature to manage what pages to display.
The problem is that I cant find a way to filter the pages by excluding a taxonomy.

Is that even possible? I would like to include all pages except those of a certain category.

Dummy code (does not work!):

content:
items:
'@taxonomy':
category: is not 'bar'

I don't think we support that yet, please create a feature request: https://github.com/getgrav/grav/issues