chore: add note about preference of stream() to get() (GoogleCloudPlatform#3972)

sdlin · gcf-merge-on-green[bot] · Takashi Matsuo · web-flow · commit f3a9eef3175d · 2020-06-05T14:51:12.000-07:00
* Add note about CollectionRef get deprecation.

* Update note.

Co-authored-by: gcf-merge-on-green[bot] &lt;60162190+gcf-merge-on-green[bot]@users.noreply.github.com&gt;
Co-authored-by: Takashi Matsuo &lt;tmatsuo@google.com&gt;
diff --git a/firestore/cloud-client/snippets.py b/firestore/cloud-client/snippets.py
@@ -244,6 +244,7 @@ def get_custom_class():
 def get_simple_query():
     db = firestore.Client()
     # [START get_simple_query]
+    # Note: Use of CollectionRef stream() is prefered to get()
     docs = db.collection(u'cities').where(u'capital', u'==', True).stream()
 
     for doc in docs:
