java - Create doc with subcollection in one shot

Question

Let's say I have collection called root

Can I create document with its subcollection in one call?

I mean if I do:

db.Collection("root").document("doc1").Collection("sub").document("doc11").Set(data) 

Then will that create the structure in one shot? To be honest I gave this a try and doc1 had an italics heading which I thought only for deleted docs

Answer 1

Waitting for answers