Datastax Enterprise Graph GroupCount Order - datastax-enterprise

Question

I have multiple documents
I have multiple users
Users read documents
I want to get documents who read by user Stefan.
g.V().
has('user','name','Stefan').
out('read').
hasLabel('document')
What other users has read the same document. And what other documents are those users reading wich the user Stefan doesn't have:
g.V().
has('user','name','Stefan').
out('read').
hasLabel('document').
in('read').
has('user','name',neq('Stefan')).
out('read').
match(
__.as('d').hasLabel('document'),
__.not(__.as('d').hasLabel('document').in('read').has('user','name','Stefan'))
).
select('d').valueMap('docId','title')
Now i want to sort this by number of user what read the document with groupCount.
g.V().
has('user','name','Stefan').
out('read').
hasLabel('document').
in('read').
has('user','name',neq('Stefan')).
out('read').
match(
__.as('d').hasLabel('document'),
__.not(__.as('d').hasLabel('document').in('read').has('user','name','Stefan'))
).
select('d').valueMap('docId','title').
groupCount().by().
order(local).by(values,decr)
This will work, but the result is not what i want:
{
"{docId=[33975], title=[Doc1 - 5 - 1]}": 3,
"{docId=[33379], title=[Doc2 - 5]}": 2,
"{docId=[32474], title=[Doc3 - 5]}": 2,
"{docId=[31150], title=[Doc4 2-2013]}": 1,
"{docId=[107944], title=[Doc5]}": 1
}
The key is folded. I want to have 3 columns in my result:
DocId
Title
GroupCount value.
How can i do this?