Been searching and cannot find this anywhere for Drupal 8. Very basic view request, can't figure out why it's not straightforward.
I want a View that shows Parent content and under it all Children content. Nothing to do with taxonomy, just want this to display in a view:
Parent Content 1
- Child content 1
- Child content 2
- Child content 3
When trying a contextual filter, I get "This display does not have a source for contextual filters, so no contextual filter value will be available unless you select 'Provide default'."