title: Getting a specific document from a nested Firstore subcollection to a streambuilder
body: <p>So, I'm trying to display a document field but it's not working if I'm entering from a previous page. How do I display this type of subcollection from a material page route, my flutter app keeps on crashing.</p>
  <pre><code>new StreamBuilder(
                      stream: Firestore.instance
                          .collection(&quot;Users&quot;)
                          .document(uid) //from firestore getuserID
                          .collection(&quot;orders&quot;)
                          .document(widget.doc) //from materialpageroute fetched data
                          .snapshots(),
  </code></pre>
  <p>or is this not yet supported?</p>