How can i get document id which 'content' is 'test2' ?
[enter image description here](https://i.stack.imgur.com/SUmka.png)
i try like this.. but the condition does not work.

```
 ref.where(ref.doc('content') == 'test2').get().then((QuerySnapshot snapshot){
      snapshot.docs.forEach((document){
        print(document.id);
      });
 });

```

How can I get document id of specific document?
(I use flutter and cloud firestore)