How to delete all nodes with a given type?

https://dgraph.io/tour/schema/8/

shows some options for deleting

1. Delete a single triple
2. Delete all triples for a given edge
3. Delete all triples for a given node

Now i'd like to delete all triple for nodes of a given type. I assume this is done by some kind of combination of a query that selects the nodes for the the given type and then a mutation for each of these nodes. I couldn't find an example for this in the tutorial.

Let's assume I'd like to delete all triples for nodes of the type Country.

I know how to select the uids for the nodes:

    {  
      query(func: has(<dgraph.type>)) @filter(eq(<dgraph.type>, "Country")) {
        uid
      }
    }

But how do i combine this with a mutation?

https://discuss.dgraph.io/t/how-to-bulk-delete-nodes-or-cascade-delete-nodes/7308

seems to ask for an "upsert"

How could the deletion of all triples for nodes with a given type be achieved?

the following upsert seems to work:

upsert {  
  query {
    # get the uids of all Country nodes
     countries as var (func: has(<dgraph.type>)) @filter(eq(<dgraph.type>, "Country")) {
        uid
    }
  }
  mutation {
    delete {
      uid(countries) * * .
    }
  }
}