Delete folder with contents from Firebase Storage
<p>I can easily delete a file within a child reference, but how would I delete the entire folder from Firebase Storage?</p>

<pre><code>let postRef = FIRStorage.storage().reference().child("posts/folderName")
    postRef.deleteWithCompletion { (error) in
        print(error)
    }
</code></pre>

<p>Error file does not exists. Any ideas?</p>