title: Understanding Monomorphic Containers w/ Foldable
body: <p><code>snoyberg/mono-traversable</code>'s <a href="https://github.com/snoyberg/mono-traversable/tree/master/mono-traversable#monofoldable" rel="nofollow noreferrer">README</a> notes</p>
  
  <blockquote>
    <p>[MonoFoldable  is the same] as Foldable, but also operates over monomorphic containers.</p>
  </blockquote>
  
  <p>Please give an example where <code>Foldable</code> does not operate over monomorphic containers.</p>