title: Retrieve HTTP response headers from WKWebview
body: <p>I need to read the response HTTP headers from a <code>WKWebview</code>'s request. I need to perform customizations based on certain custom headers sent by the server. It's not possible to add this information in the response data.</p>
  
  <p>I could not find any entry in the documentation nor in previous questions here.  Is there any way to do that?</p>