title: Flutter - How add separators fot BottomNavigationBar?
body: <p>I use BottomNavigationBar in my flutter app. This is exist view:</p>
  
  <p><a href="https://i.stack.imgur.com/uO4qm.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/uO4qm.png" alt="enter image description here"></a></p>
  
  <p>but I need to add separators between items. like this:</p>
  
  <p><a href="https://i.stack.imgur.com/PPvfh.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/PPvfh.png" alt="enter image description here"></a></p>
  
  <p>Is it possible? is there a simple way to implement this?</p>