title: Display default printing of composite types when it has a custom `show` defined
body: <p>If a package author has defined a <a href="https://stackoverflow.com/a/43624440/371843">custom <code>show</code> function</a> for their composite type, is there a way to easily print the default <code>show</code>? That is, what Julia would have shown for the composite type before the customization?</p>
  
  <p>I am using Juno to step through the code of complex functions to try and I want to see the data representation but the full structure of the <code>struct</code> isn't shown due to the custom printing.</p>