title: Getting the documentID of a Firestore document in flutter?
body: <p>How do I get the generated documentID of a document in Firestore in Flutter?</p>
  
  <p>I know I can access the various fields of a document like this: </p>
  
  <pre><code>    return Firestore().collection(postPath).data.documents.forEach((response) {
        nodeList.add(Post(
          // response.data().id - how do i get the UID (example: -LUoDIu4wlVksjbbfIWE)?
          response['content'],
          response['date'],
          response['flair'],
          response['location'],
          response['username'],
        ));
  });
  </code></pre>
  
  <p>But I am unsure of the method to call get the UID of the document.</p>