There is an example for using the decoration functionality in Atom on https://atom.io/docs/api/v1.21.0/Decoration. This example is not complete - I assume a styling declaration is needed.
Could someone please help me to fill in the blanks to have the example do something.
Another more complete example is mentioned on http://blog.atom.io/2014/07/24/decorations.html which links to https://github.com/atom/decoration-example. This is a wonderful example created by the Atom design team. But sadly it is now outdated and does not work on current versions of Atom.
Thank you for your attention.