title: Can we not query collections inside transactions?
body: <p>Looking at <a href="https://firebase.google.com/docs/reference/js/firebase.firestore.Transaction" rel="noreferrer">https://firebase.google.com/docs/reference/js/firebase.firestore.Transaction</a> I see four methods: delete, set, get, update.</p>
  
  <p>I was about to construct a lovely little collection query and pass it to .get, but I see the docs say that .get "Reads the document referenced by the provided <strong>DocumentReference</strong>."</p>
  
  <p>It appears this means we cannot get a collection, or query a collection, with a Transaction object.</p>
  
  <p>I <em>could</em> query those with the query's .get() method instead of the transaction's .get() method, but if the collection changes out from under me, the transaction will end up in an inconsistent state without retrying.</p>
  
  <p>It seems I am hitting a wall here. Is my understanding correct? Can we not access collections inside a transaction in a consistent way?</p>