Maher Aldemerdash

A small help about shading

Hey guys, 

 I am new here and loving the site. I am watching the "intro to shading" course and I was hoping to learn about the principle shader but the course is teaching the old ways of doing shading. Did anyone here tried to do the videos of the metallic ball with the new shader? if yes, can you share a picture of the nodes please?

Thanks in advance :)