title: How to pass data from one provider model to another?
body: <p>I want use <code>provider</code> (<code>ChangeNotifierProvider</code>) and <code>ChangeNotifier</code> for manage app state. But how I can access state from one model in another model?</p>
  
  <p>Use case: In chat app, one model for store user information. Other model use user information (for example user id) to make call to database (Firestore) and get stream of chat data. </p>
  
  <p>For example:</p>
  
  <pre><code>class Model1 extends ChangeNotifier {
    final List&lt;Item&gt; items = [];
  
  class Model2 extends ChangeNotifier {
  //Access items from Model1 here
  items;
  </code></pre>
  
  <p>Is this possible? I not like have very big Model because is hard to maintain.</p>
  
  <p>  Thanks!</p>