title: How to use multiple Consumers for a single widget in flutter Provider
body: <p>I can't wrap my head around using <strong>multiple consumers</strong> for a single widget with provider? Suppose my widget is CurvedNavigationBar and I have 4 items in that widget. I also have 4 different classes that extend ChangeNotifier and <strong>are responsible for each item in CurvedNavigationBar.</strong></p>
  
  <p><strong>How can I listen to those 4 change notifiers in a single widget</strong>? I looked at the documentation and could not found such an example.. is this even possible? I found that Consumer has a builder method, so that means you can build a widget <strong>only once/and listen to it once.</strong> </p>
  
  <p>Should I rather have a single class that extends ChangeNotifier and then update values in that widget and uses only a single Consumer to listen for updated values?</p>