The best way to start is to check out the sample app which comes with the SDK download package together with the respective documentation section.
The sample app deals with the requiredFeatures and you can check the implmentation and comments from there.
Thank you. I have looked through all of those. What I am looking for is documentation on the available requiredFeatures that you can pass in specifically in a Cordova plugin. There is no documentation on it as far as I can tell. There should be documentation so people don't have to search through sample lessons and make their own list.