title: What does CascadeType.REFRESH actually do?
body: <p>What does the <code>CascadeType.REFRESH</code> actually do? </p>
  
  <p>The definition for it is </p>
  
  <blockquote>
    <p>When we refresh an entity all the entities held in this field refresh too</p>
  </blockquote>
  
  <p>but what does this mean in practice? Could someone please give me a simple example?</p>