title: Firebase remove observers with variable handles?
body: <p>Currently, I am adding an observer for every post in a feed, as such: <code>let postChangingDetailsObservation = Database.database().reference().child("postDetails").child(postID).child(UID!)</code> For every postID, an observer is added. Is there a way to remove all these observers when the view disappears, as, say <code>Database.database.reference.child("postDetails").removeAllObservers()</code>? How else would I be able to remove every single observer added when the view disappears?</p>