title: Maven: How do I mark a jar as sealed?
body: <p>This sounds so simple, so why an I struggling?</p>
  
  <p>Is there a POM entry I can use to seal all the packages?</p>
  
  <p>Or do I provide a manifest with value 'Sealed: true'?</p>
  
  <p>Thanks
  Jeff Porter</p>