title: Laravel Backpack 4.0. Save a model then another one (different)
body: <p>In my laravel/backpack 4.0 project I have three model:</p>
  
  <pre><code>Product:   id, name, ...
  Pricebook: id, name, ...
  Price:     id, pricebook_id, value, ...
  </code></pre>
  
  <p>I need to create a row in prices table every time a new Product is stored id database.
  Is there a method like 'before' or 'after' save to hook?
  if not, any other solution?</p>